CN214068099U - Experimental apparatus for verifying Faraday's law of electromagnetic induction - Google Patents
Experimental apparatus for verifying Faraday's law of electromagnetic induction Download PDFInfo
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- CN214068099U CN214068099U CN202023245054.4U CN202023245054U CN214068099U CN 214068099 U CN214068099 U CN 214068099U CN 202023245054 U CN202023245054 U CN 202023245054U CN 214068099 U CN214068099 U CN 214068099U
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- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 38
- 230000006698 induction Effects 0.000 claims abstract description 28
- 238000012795 verification Methods 0.000 claims abstract description 10
- 238000002474 experimental method Methods 0.000 claims abstract description 9
- 238000005476 soldering Methods 0.000 claims description 15
- 239000004020 conductor Substances 0.000 abstract description 11
- 230000001681 protective effect Effects 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000009795 derivation Methods 0.000 description 2
- 210000003811 finger Anatomy 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses an experimental apparatus is verified to Faraday's electromagnetic induction law, including constant voltage power supply, switch one, current sensor, the potentiometre, protection resistance, the electrical coil, induction coil, switch two and voltage sensor, induction coil cup joints in the outside of electrical coil, an output of constant voltage power supply passes through the conductor wire and is connected with one of them extreme point of switch one, another extreme point of switch one passes through the conductor wire and is connected with one of them extreme point of current sensor, another extreme point of current sensor passes through the conductor wire and is connected with one of them extreme point of potentiometre, another extreme point of potentiometre passes through the conductor wire and is connected with one of them extreme point of protection resistance, another extreme point of protection resistance passes through the conductor wire and is connected with the one end of electrical coil. The utility model is simple in operation, and can the quantitative verification Faraday's law of electromagnetic induction, can stabilize to electrical coil and provide voltage, improve Faraday's law of electromagnetic induction and verify that the experiment is more stable.
Description
Technical Field
The utility model relates to a physics experiment technical field especially relates to a Faraday's electromagnetic induction law verifies experimental apparatus.
Background
The electromagnetic induction law is also called faraday's electromagnetic induction law, and the electromagnetic induction phenomenon is a phenomenon in which an induced electromotive force is generated due to a change in magnetic flux, for example, when a part of a conductor of a closed circuit makes a motion of cutting a magnetic induction line in a magnetic field, a current is generated in the conductor, the generated current is called an induced current, and the generated electromotive force (voltage) is called an induced electromotive force.
The direction of the electromotive force in the law of electromagnetic induction can be determined by lenz's law or right-hand rule. Content of right-hand rule: the right hand is stretched to enable the thumb to be perpendicular to the four fingers, the palm of the hand faces to the N pole of the magnetic field, the direction of the thumb is consistent with the moving direction of the conductor, and the direction pointed by the four fingers is the direction of induced current in the conductor (the direction of induced electromotive force is the same as the direction of the induced current). Lenz's law states that: the magnetic field of the induced current will hinder the change of the primary flux. In short, the magnetic flux becomes large, and the generated current tends to become small; the magnetic flux becomes smaller, and the generated current tends to become larger.
Faraday's electromagnetic induction law among the prior art verifies experimental apparatus, has following problem: the cost is relatively high, the operation is relatively complex, and the Faraday's law of electromagnetic induction cannot be quantitatively verified relatively well.
Therefore, it is necessary to design a faraday's law of electromagnetic induction verification experimental apparatus to solve the above problems.
Disclosure of Invention
The utility model aims at solving the shortcoming that the Faraday law of electromagnetic induction can not be verified to the better ration relatively that exists among the prior art, and the experimental apparatus is verified to the Faraday law of electromagnetic induction who provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a Faraday electromagnetic induction law verification experiment device comprises a voltage-stabilized power supply, a first switch, a current sensor, a potentiometer, a protection resistor, a first electrified coil, an induction coil, a second switch and a voltage sensor, wherein the induction coil is sleeved outside the first electrified coil, one output end of the voltage-stabilized power supply is connected with one end point of the first switch through a conducting wire, the other end point of the first switch is connected with one end point of the current sensor through a conducting wire, the other end point of the current sensor is connected with one end point of the potentiometer through a conducting wire, the other end point of the potentiometer is connected with one end point of the protection resistor through a conducting wire, the other end point of the protection resistor is connected with one end of the first electrified coil through a conducting wire, and the other output end of the voltage-stabilized power supply is connected with the other end point of the first electrified coil through a conducting wire, one output end of the voltage sensor is connected with one end point of a second switch through a conducting wire, the other output end of the second switch is connected with one end of the induction coil through a conducting wire, the other output end of the voltage sensor is connected with the other end point of the induction coil through a conducting wire, the loop current of the electrified coil is I = U/(R + kt), and k = VR 0/L.
The key concept of the technical scheme is as follows: the cost is low, the operation is simple, and the Faraday electromagnetic induction law can be quantitatively verified.
Furthermore, the potentiometer comprises a rotating shaft, the outer portion of the rotating shaft is rotatably connected with a sliding end, and the outer portion of the rotating shaft is rotatably connected with a sliding arm.
Furthermore, the outer part of the rotating shaft is rotatably connected with a resistor body, a first soldering lug and a third soldering lug are welded at two ends of the resistor body respectively, and a second soldering lug is welded at one side of the sliding arm.
Furthermore, one side of the potentiometer is provided with a speed-adjustable motor, and the output end of the speed-adjustable motor is connected to one side of the sliding end.
The utility model has the advantages that:
1. the experimental device for verifying the Faraday law of electromagnetic induction has the advantages of low cost and simplicity in operation, and can be used for quantitatively verifying the Faraday law of electromagnetic induction.
2. Through the constant voltage power supply who sets up, constant voltage power supply can stabilize to the circular telegram coil and provide voltage, and it is more stable to improve Faraday's electromagnetic induction law and verify the experiment.
3. Through the potentiometer and the adjustable-speed motor, the potentiometer can adjust the current entering the electrified coil, the potentiometer can be automatically adjusted through the adjustable-speed motor, and meanwhile, the current entering the electrified coil is convenient to adjust.
Drawings
Fig. 1 is a schematic view of an overall structure of a faraday electromagnetic induction law verification experimental apparatus provided by the present invention;
fig. 2 is the utility model provides a potentiometre structure sketch map of experimental apparatus is verified to faraday's law of electromagnetic induction.
In the figure: the speed-adjustable motor comprises a voltage-stabilized power supply 1, a switch I2, a current sensor 3, a potentiometer 4, a protective resistor 5, a current-carrying coil 6, an induction coil 7, a switch II 8, a voltage sensor 9, a rotating shaft 10, a sliding end 11, a sliding arm 12, a resistor 13, a soldering lug I14, a soldering lug II 15, a soldering lug III 16 and a speed-adjustable motor 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 2, a faraday's law of electromagnetic induction verification experimental apparatus includes a regulated power supply 1, a switch one 2, a current sensor 3, a potentiometer 4, a protection resistor 5, a power coil 6, an induction coil 7, a switch two 8 and a voltage sensor 9, which can quantitatively verify the faraday's law of electromagnetic induction, the induction coil 7 is sleeved outside the power coil 6, one output end of the regulated power supply 1 is connected with one end point of the switch one 2 through a conductive wire, the regulated power supply 1 can stably provide voltage for the power coil 6, so as to improve the faraday's law of electromagnetic induction verification experiment to be more stable, the other end point of the switch one 2 is connected with one end point of the current sensor 3 through a conductive wire, the current sensor 3 is connected with a computer, the current sensor 3 is externally connected with a computer in a circuit, and monitors the change of the loop current of the power coil 6 with time, the other end point of the current sensor 3 is connected with one end point of the potentiometer 4 through a conducting wire, the other end point of the potentiometer 4 is connected with one end point of the protective resistor 5 through a conducting wire, the other end point of the protective resistor 5 is connected with one end of the electrified coil 6 through a conducting wire, the other output end of the stabilized voltage power supply 1 is connected with the other end of the electrified coil 6 through a conducting wire, one output end of the voltage sensor 9 is connected with one end point of the switch II 8 through a conducting wire, the voltage sensor 9 is connected to a computer, data of the change of the induced electromotive force along with time can be led into the computer, and the other output end of the switch II 8 is connected with one end point of the induction coil 7 through a conducting wire by observing the change relation of the induced electromotive force along with time t and the change relation of the current along with t in a loop of the electrified coil 6 and the change of the magnetic induction intensity along with time t, the other output end of the voltage sensor 9 is connected with the other end point of the induction coil 7 through a conducting wire, the loop current of the electrified coil 6 is I = U/(R + Kt), U is the voltage of the regulated power supply 1, R is the protective resistor 5 with known resistance, K is the speed of resistance change of the potentiometer 4, if the sliding end speed of the potentiometer 4 is V, the total resistance of the resistor is R0, the total length is L, when the initial resistance of the potentiometer is 0, K = VR0/L, B = μ 0nI, n is the number of turns dI/dt = -Uk/(R + Kt) ^2 per unit length of the electrified coil 6, dB/dt = μ 0ndI/dt = - μ 0 nUk/(R + Kt) ^2, the induced electromotive force ε = Nd Φ/dt = NSdB/dt = -NS = - μ 0 nUk/(R + Kt) ^2 per unit length, n is the number of turns of the induction coil 7.
As can be seen from the above description, the present invention has the following advantages: the experimental device for verifying the Faraday law of electromagnetic induction has the advantages of low cost and simplicity in operation, and can be used for quantitatively verifying the Faraday law of electromagnetic induction.
Further, the potentiometer 4 comprises a rotating shaft 10, the potentiometer 4 can adjust current entering the electrified coil 6, a sliding end 11 is rotatably connected to the outside of the rotating shaft 10, and a sliding arm 12 is rotatably connected to the outside of the rotating shaft 10.
Further, a resistor 13 is rotatably connected to the outside of the rotating shaft 10, a first soldering lug 14 and a third soldering lug 16 are respectively welded to two ends of the resistor 13, and a second soldering lug 15 is welded to one side of the sliding arm 12.
Furthermore, one side of the potentiometer 4 is provided with an adjustable speed motor 17, the potentiometer 4 can be automatically adjusted through the adjustable speed motor 17, the current entering the electrified coil 6 is convenient to adjust, and the output end of the adjustable speed motor 17 is connected to one side of the sliding end 11.
By adopting the potentiometer 4 and the speed-adjustable motor 17 which are arranged as above, the potentiometer 4 can adjust the current entering the electrified coil 6, the potentiometer 4 can be automatically adjusted through the speed-adjustable motor 17, and meanwhile, the current entering the electrified coil 6 can be conveniently adjusted.
In the following, some preferred embodiments or application examples are listed to help those skilled in the art to better understand the technical content of the present invention and the technical contribution of the present invention to the prior art:
example 1
A Faraday's law of electromagnetic induction verifies experimental apparatus, including constant voltage power supply 1, switch 2, current sensor 3, potentiometer 4, protective resistance 5, the circular telegram coil 6, induction coil 7, switch two 8 and voltage sensor 9, can verify the law of Faraday's law of electromagnetic induction quantitatively, the induction coil 7 cup joints the outside at the circular telegram coil 6, an output of constant voltage power supply 1 is connected with one of the end points of switch 2 through the conductor wire, constant voltage power supply 1 can provide voltage to circular telegram coil 6 steadily, it is more stable to improve the experiment of Faraday's law of electromagnetic induction verification, another end point of switch 2 is connected with one of the end points of current sensor 3 through the conductor wire, current sensor 3 is connected with the computer, current sensor 3 connects the computer in the circuit in addition, monitor the change along with time of circular current of circular telegram coil 6, the other end point of the current sensor 3 is connected with one end point of the potentiometer 4 through a conducting wire, the other end point of the potentiometer 4 is connected with one end point of the protective resistor 5 through a conducting wire, the other end point of the protective resistor 5 is connected with one end of the electrified coil 6 through a conducting wire, the other output end of the stabilized voltage power supply 1 is connected with the other end of the electrified coil 6 through a conducting wire, one output end of the voltage sensor 9 is connected with one end point of the switch II 8 through a conducting wire, the voltage sensor 9 is connected to a computer, data of the change of the induced electromotive force along with time can be led into the computer, and the other output end of the switch II 8 is connected with one end point of the induction coil 7 through a conducting wire by observing the change relation of the induced electromotive force along with time t and the change relation of the current along with t in a loop of the electrified coil 6 and the change of the magnetic induction intensity along with time t, the other output end of the voltage sensor 9 is connected with the other end point of the induction coil 7 through a conducting wire, the loop current of the electrified coil 6 is I = U/(R + kt), U is the voltage of the regulated power supply 1, R is the protective resistor 5 with a known resistance, K is the speed of resistance change of the potentiometer 4, if the sliding end speed of the potentiometer 4 is V, the total resistance of the resistor is R0, and the total length is L, K = VR0/L has B = μ 0nI, N is the number of turns dI/dt = -Uk/(R + kt) ^2 of the electrified coil 6, Nd/dt = μ 0ndI/dt = - μ 0 nUk/(R + kt) ^2, the induced electromotive force ε = Φ/dt = NSdB/dt = -NS =μ0 nUk/(R + kt) ^2, and N is the number of turns of the induction coil 7.
The potentiometer 4 comprises a rotating shaft 10, the potentiometer 4 can adjust current entering the electrified coil 6, the outer part of the rotating shaft 10 is rotatably connected with a sliding end 11, and the outer part of the rotating shaft 10 is rotatably connected with a sliding arm 12; a resistor body 13 is rotatably connected to the outside of the rotating shaft 10, a first soldering lug 14 and a third soldering lug 16 are respectively welded to two ends of the resistor body 13, and a second soldering lug 15 is welded to one side of the sliding arm 12; the adjustable-speed motor 17 is arranged on one side of the potentiometer 4, the potentiometer 4 can be automatically adjusted through the adjustable-speed motor 17, the current entering the electrified coil 6 can be conveniently adjusted, and the output end of the adjustable-speed motor 17 is connected to one side of the sliding end 11.
The working principle is as follows: when the experimental electromagnetic induction coil 7 is used, a tapped type electromagnetic induction coil is used, the number of turns N can be changed in multiples, the induced electromotive force U and N are verified to be in direct proportion, the k value can be adjusted by adjusting the rotating speed of the speed-adjustable motor 17, and verifying that the induced electromotive force U is in direct proportion to the time change rate of the magnetic induction intensity.
The Faraday electromagnetic induction law verifying device generates a changing magnetic field by changing the current of the electrified coil 6, the electrified coil 6 is externally connected with a circuit, the circuit is powered by a constant voltage power supply 1, the resistance value of a resistor in a loop is adjusted by the rotation of a potentiometer 3, the rotating speed of the potentiometer 3 is adjustable, the speed of the change of the resistance value in the loop can be adjusted by different rotating speeds of the potentiometer 3, namely the k value in the derivation process is adjusted, so as to generate current with different continuous changing speeds, a current sensor 3 is externally connected with a computer in the circuit, the change of the current of the electrified coil 6 along with time is monitored, a Faraday coil and an induction coil 7 are arranged outside the electrified coil 6, the number of turns can be adjusted in a tapped mode in a multiplying mode, the loop of the induction coil 7 is connected with a voltage sensor 9, the data of the change of the induced electromotive force along with time can be led into the computer, and the relation of the change of the induced electromotive force along with time t in the loop of the coil 6 and the magnetic induction intensity along with time are observed And (4) comparing the relation of t change with a theoretical value derivation result, and quantitatively verifying the Faraday electromagnetic induction law if the relation is consistent in an error range.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. A Faraday electromagnetic induction law verification experiment device comprises a stabilized voltage power supply (1), a first switch (2), a current sensor (3), a potentiometer (4), a protection resistor (5), a powered coil (6), an induction coil (7), a second switch (8) and a voltage sensor (9), and is characterized in that the induction coil (7) is sleeved outside the powered coil (6), one output end of the stabilized voltage power supply (1) is connected with one end point of the first switch (2) through a conducting wire, the other end point of the first switch (2) is connected with one end point of the current sensor (3) through a conducting wire, the other end point of the current sensor (3) is connected with one end point of the potentiometer (4) through a conducting wire, the other end point of the potentiometer (4) is connected with one end point of the protection resistor (5) through a conducting wire, the other end point of the protection resistor (5) is connected with one end of the electrified coil (6) through a conducting wire, the other output end of the stabilized voltage power supply (1) is connected with the other end of the electrified coil (6) through a conducting wire, one output end of the voltage sensor (9) is connected with one end point of the second switch (8) through a conducting wire, the other output end of the second switch (8) is connected with one end of the induction coil (7) through a conducting wire, the other output end of the voltage sensor (9) is connected with the other end point of the induction coil (7) through a conducting wire, the loop current of the electrified coil (6) is I = U/(R + kt), and k = VR 0/L.
2. The Faraday's law of electromagnetic induction testing apparatus according to claim 1, wherein the potentiometer (4) comprises a rotating shaft (10), a sliding end (11) is rotatably connected to the outside of the rotating shaft (10), and a sliding arm (12) is rotatably connected to the outside of the rotating shaft (10).
3. The Faraday's law of electromagnetic induction verification experiment device according to claim 2, wherein a resistor (13) is rotatably connected to the outside of the rotating shaft (10), a first soldering lug (14) and a third soldering lug (16) are respectively welded to two ends of the resistor (13), and a second soldering lug (15) is welded to one side of the sliding arm (12).
4. The Faraday's law of electromagnetic induction verification experiment device according to claim 2, wherein an adjustable speed motor (17) is arranged at one side of the potentiometer (4), and an output end of the adjustable speed motor (17) is connected to one side of the sliding end (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023245054.4U CN214068099U (en) | 2020-12-29 | 2020-12-29 | Experimental apparatus for verifying Faraday's law of electromagnetic induction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023245054.4U CN214068099U (en) | 2020-12-29 | 2020-12-29 | Experimental apparatus for verifying Faraday's law of electromagnetic induction |
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| Publication Number | Publication Date |
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| CN214068099U true CN214068099U (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023245054.4U Expired - Fee Related CN214068099U (en) | 2020-12-29 | 2020-12-29 | Experimental apparatus for verifying Faraday's law of electromagnetic induction |
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| CN (1) | CN214068099U (en) |
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- 2020-12-29 CN CN202023245054.4U patent/CN214068099U/en not_active Expired - Fee Related
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