CN109817069A - A kind of Joule Law Experiment instrument - Google Patents
A kind of Joule Law Experiment instrument Download PDFInfo
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- CN109817069A CN109817069A CN201910287489.8A CN201910287489A CN109817069A CN 109817069 A CN109817069 A CN 109817069A CN 201910287489 A CN201910287489 A CN 201910287489A CN 109817069 A CN109817069 A CN 109817069A
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Abstract
The present invention provides a kind of Joule Law Experiment instrument, is related to a kind of physics teaching experiment instrument.The experiment instrument is mainly made of the part such as air exchanging plug, ammeter, flask, resistance wire, switch, U-tube, slide rheostat, support leg, rubber tube, gas-guide tube, bakelite plug, pallet, timer, panel and power supply, very easy to use as a whole.It can be convenient change electric current using slide rheostat, timer can change setting time, heating time one, which arrives, to be automatically disconnected the circuit, student can attentively observe the fluid change in U-tube and be compared, experiment is finished every time is taken a breath using air exchanging plug, substantially reduces experimental period, makes to test simple to operation, convenient intuitive, and can be organically combined with traditional experiment, it is more advantageous to the development of Experimental Research teaching.
Description
Technical field
The present invention relates to a kind of physics teaching experiment instruments, more particularly, to a kind of Joule Law Experiment instrument.
Background technique
Currently, the content that Joule Law Experiment is Section four of the 18th chapter of ninth grade " physics " is according to the arrangement of textbook
With two flasks heating kerosene come what is demonstrated, this experimental design principles is fine, but in field research, there is also it is following not
Foot: 1, heating time is long, and attention of student is easy dispersion, is unfavorable for handling classes；2, temperature after heating meter registration changes
Smaller, student is difficult to observe, and kerosene smell is very big, is also unfavorable for observation of students, and the sense of participation of student is not strong；3, it burns
After kerosene heating in bottle, cool down slower, need some time thermometer that can just return to original registration, so being provided in classroom
Time in cannot change experiment condition and take multiple measurements, demonstration Joule Law Experiment becomes a teaching difficulty, not side
Just student intuitively observation experiment process and experiences experimental result.
Summary of the invention
It is above in order to overcome the shortcomings of, quickly and accurately demonstrate resistance wire release heat how much with resistance wire electricity
It hinders, the relationship of electric current and conduction time, preferably verifying Joule's law, the present invention provide a kind of Joule Law Experiment instrument, be related to
A kind of physics teaching experiment instrument.The experiment instrument is mainly by air exchanging plug, ammeter, flask, resistance wire, switch, U-tube, sliding
The part such as rheostat, support leg, rubber tube, gas-guide tube, bakelite plug, pallet, timer, panel and power supply forms, as one
It is whole very easy to use.It can be convenient change electric current using slide rheostat, and timer can change setting time, heating
Student can attentively observe the fluid change in U-tube and be compared to automatically disconnecting the circuit time one, and experiment finishes every time
Taken a breath using air exchanging plug, substantially reduce experimental period, make to test it is simple to operation, convenient intuitive, and can with it is traditional
Experiment organically combines, and is more advantageous to the development of Experimental Research teaching.It is main that the present invention solves scheme used by its technical problem
There is the following.
1, the experiment instrument includes liquid injection port, graduation mark, air exchanging plug, ammeter wiring column, ammeter, flask 1, power supply wiring
Column, resistance wire R1, switch columm, switch, U-tube 1, slide rheostat, fixing clamp, leveling serew, support leg, rubber tube,
Gas-guide tube, resistor wiring column, bakelite plug, retainer plate, resistance wire R2, flask 2, pallet, U-tube 2, timer, timer wiring
The parts such as column, panel and power supply, wherein the panel is supported by support leg, can be adjusted by the leveling serew in support leg
The stability of entire experiment instrument, the power supply are fixed on the back side of panel, and ammeter, switch, slide rheostat and timer are all solid
It is scheduled on the front of panel, it is immovable, and by the rear connection in panel, there is corresponding wiring in the front of panel
Column.
2, the U-tube 1 and U-tube 2 are fixed on panel by fixing clamp, are the glass tubules of same model, on
There is liquid injection port in portion, and the inside is perfused with the contour colored liquid of liquid level, and label liquid level is carved on the panel among U-tube
Graduation mark.
3, the pallet is fixed on panel, and flask 1 and flask 2 are placed on pallet, and there is part at the flask body back side
It imbeds in panel, bottleneck is fixed on panel by retainer plate, and above the pallet and back side of flask is lined with heat-preservation cotton, flask 1
It is the thick mouth high temperature resistant flask of same size with flask 2, bottleneck stoppers sealing with bakelite plug, and in bakelite fixation beyond the Great Wall, there are two electricity
Hinder binding post, be terminated with resistance wire under binding post, the resistance wire of different resistance values can be replaced according to actual needs, bakelite beyond the Great Wall
There are also one is long and the other is short two gas-guide tubes, wherein short air exchanging plug for air guide tube stoppers, long gas-guide tube passes through rubber tube and U-tube
It is connected, flask 1 is connected with U-tube 1, and flask 2 is connected with U-tube 2, bakelite plug, rubber tube, air exchanging plug, gas-guide tube, U-shaped
Pipe 1, U-tube 2, resistance wire R1, resistance wire R2, flask 1 and flask 2 can dismantle or replace.
The beneficial effects of the present invention are: 1, heating time is short, attention of student is easy to concentrate, and is conducive to the religion of tissue classroom
It learns；2, the liquid level registration after heating in U-tube changes greatly, and student is easy observation, and is the air heated in flask, does not have
Smell, gas temperature is not high, is also beneficial to observation of students, and student facilitates participation；3, after the air heating in flask, heat dissipation is very
Fastly, and using air exchanging plug it takes a breath, only needs very short time entire flask that can cool down, the liquid level in U-tube can return to original
The registration position come, takes multiple measurements so can change experiment condition in the time as defined in classroom, and it is fixed successfully to demonstrate joule
Rule experiment, facilitates student intuitively observation experiment process and to experience experimental result.The whole experiment process used time is very short, simple easily behaviour
Make, student's property of participation is strong.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is 1 circuit connection diagram of the embodiment of the present invention.
Fig. 3 is 2 circuit connection diagram of the embodiment of the present invention.
Specific embodiment
The present invention provides a kind of Joule Law Experiment instrument, and it is fixed that joule can be quickly and accurately verified with new experimental program
Rule.
Structural schematic diagram of the invention is as shown in Figure 1, include liquid injection port (1), graduation mark (2), air exchanging plug (3), ammeter
Binding post (4), ammeter (5), flask 1(6), power -line terminal (7), resistance wire R1(8), switch columm (9), switch
(10), U-tube 1(11), slide rheostat (12), fixing clamp (13), leveling serew (14), support leg (15), rubber tube (16),
Gas-guide tube (17), resistor wiring column (18), bakelite plug (19), retainer plate (20), resistance wire R2(21), flask 2(22), pallet
(23), U-tube 2(24), timer (25), timer binding post (26), panel (27), power supply (28).The panel (27) by
Support leg (15) support can adjust the stability of entire experiment instrument, the electricity by the leveling serew (14) on support leg (15)
Source (28) is fixed on the back side of panel, and ammeter (5), switch (10), slide rheostat (12) and timer (25) are all fixed on
The front of panel (27), it is immovable, and by the rear connection in panel (27), there is phase in the front of panel (27)
Corresponding binding post；U-tube 1(11) and U-tube 2(24) be fixed on panel (27) by fixing clamp (13), it is same model
Glass tubule, top has liquid injection port (1), and the inside is perfused with the contour colored liquid of liquid level, and (in the present embodiment is dilution
Red ink), and be carved on the panel (27) among U-tube label liquid level graduation mark (2)；Pallet (23) is fixed on
On panel (27), flask 1(6) and flask 2(22) be placed on pallet (23), the flask body back side has part to imbed panel (27)
In, bottleneck is fixed on panel (27) by retainer plate (20), and pallet (23) is lined with heat-preservation cotton with the back side of flask above, is burnt
Bottle 1(6) and flask 2(22) be same size thick mouth high temperature resistant flask, bottleneck stoppers sealing with bakelite plug (19), in bakelite plug
(19) there are two being fixed on resistor wiring column (18), it is terminated with resistance wire under binding post, difference can be replaced according to actual needs
The resistance wire of resistance value, there are also one is long and the other is short two gas-guide tubes (17) on bakelite plug (19), wherein short air exchanging plug for air guide tube
(3) stopper, long gas-guide tube with rubber tube (16) with U-tube by being connected, flask 1(6) be connected with U-tube 1(11), flask
Being connected with U-tube 2(24) 2(22), bakelite plug (19), rubber tube (16), air exchanging plug (3), gas-guide tube (17), U-tube 1
(11), U-tube 2(24), resistance wire R1(8), resistance wire R2(21), flask 1(6) and flask 2(22) can dismantle or replace.
Embodiment 1, as shown in Fig. 2, by ammeter (5), flask 1(6) resistance wire R1(8), slide rheostat (12), fixed
When device (25), switch (10) and power supply (28) connect, first cover flask 1(6 with hand) several seconds, see U-tube 1(11) whether occur
Liquid level is poor, and to examine the air-tightness of flask, hand is unclamped after checking well, is extracted air exchanging plug (3), cooling, the U-tube 1(11 to flask)
Air exchanging plug (3) is sealed up again after liquid level is equal, closure switch (10), adjusts timer (25) and arrive setting time, resistance wire R1(8)
Begin to warm up, flask 1(6) in gas be heated expansion, cause U-tube 1(11) occur that liquid level is poor, recording ammeter (5)
The time of registration and setting, when reaching the time of setting, timer (25) is automatically disconnected the circuit.Record U-tube 1(11) most
High liquid level (HLL) is poor.It keeps the resistance value of slide rheostat (12) constant (electric current is constant), changes the setting time of timer (25), repeat
Aforesaid operations, many experiments record time for setting every time and U-tube 1(11) highest liquid level poor (may be regarded as exothermic
Variation), it can be obtained the numerical value of multiple groups conduction time Yu liquid level poor (may be regarded as heat), the figure of t-Q can be obtained by plotted versus
Picture.Note: air exchanging plug (3) ventilation will be extracted before experiment every time, stoppers air exchanging plug (3) again after flask is cooling.
It keeps setting time constant, changes slide rheostat (12) slide plate position, to change the size of electric current, in repetition
Operation is stated, the registration of recording ammeter and the highest liquid level of U-tube 1 are poor.Repeatedly measurement, it is poor with liquid level to can be obtained multiple groups electric current
The numerical value of (may be regarded as exothermic variation), the curve graph of I-Q can be obtained by plotted versus.
Keep setting time constant, the resistance wire R of flask 1(6)1Change into different resistance values resistance wire (with nipper plier and
Bottle opener changes, and cannot directly use hand contact resistance silk), change slide rheostat (12) slide plate position, to control the size of electric current
It is constant, aforesaid operations are repeated, resistance wire R is recorded1(8) resistance value and U-tube 1(11) highest liquid level it is poor.Repeatedly measurement
The numerical value for obtaining multiple groups resistance and liquid level poor (may be regarded as exothermic variation), the curve graph of R-Q can be obtained by plotted versus.
Embodiment 2, as shown in figure 3, by flask 1(6) resistance wire R1(8), flask 2(22) resistance wire R2(21) it changes into
The resistance wire (being changed with nipper plier and bottle opener, cannot directly use hand contact resistance silk) of different resistance values, allows R1> R2Or R1< R2, with
Ammeter (5), slide rheostat (12), timer (25), switch (10) and power supply (28) series connection, cover flask 1 with hand respectively
With flask more than 2 seconds, see U-tube 1(11) and U-tube 2(24) whether occur that liquid level is poor, to examine the air-tightness of flask, check
Hand is unclamped after good, is extracted air exchanging plug (3), air exchanging plug (3) is sealed up again after flask cooling, U-tube liquid level are equal, closure switch
(10), timer (25) are adjusted and arrives setting time, resistance wire R1(8) and resistance wire R2(21) it begins to warm up, the gas quilt in flask
Heating expansion, causing U-tube to occur, liquid level is poor, the registration of recording ammeter and the time of setting, when reaching the time of setting,
Timer (25) automatically disconnects the circuit.The direct comparative observation and highest liquid level for recording two U-tubes is poor.Change slide rheostat
(12) slide plate position, thus it is possible to vary the size of electric current carries out many experiments, experiment conclusion that you can get it.
By the resistance wire R of flask 1(6)1(8), resistance wire R2(21) resistance wire for changing similar resistance into, allows R1= R2, repeat
Aforesaid operations, the direct comparative observation and highest liquid level for recording U-tube is poor.Change slide rheostat (12) slide plate position, it can be with
The size for changing electric current carries out many experiments, experiment conclusion that you can get it.
Note: air exchanging plug (3) ventilation will be extracted before experiment every time, stoppers air exchanging plug (3) again after flask is cooling.
Claims (3)
1. a kind of Joule Law Experiment instrument, the experiment instrument is mainly by liquid injection port, graduation mark, air exchanging plug, ammeter wiring column, electric current
Table, flask 1, power -line terminal, resistance wire R1, switch columm, switch, U-tube 1, slide rheostat, fixing clamp, leveling spiral shell
Silk, support leg, rubber tube, gas-guide tube, resistor wiring column, bakelite plug, retainer plate, resistance wire R2, flask 2, pallet, U-tube 2,
The part such as timer, timer binding post, panel and power supply forms, it is characterised in that the panel is supported by support leg, can be with
The stability of entire experiment instrument is adjusted by the leveling serew in support leg, the power supply is fixed on the back side of panel, and ammeter is opened
Close, slide rheostat and timer are all fixed on the front of panel, immovable, and by the rear connection in panel,
There is corresponding binding post in the front of panel.
2. a kind of Joule Law Experiment instrument according to claim 1, it is characterised in that the U-tube 1 and U-tube 2 is logical
It crosses fixing clamp to be fixed on panel, is the glass tubule of same model, liquid injection port arranged at top, and the inside is perfused with that liquid level is contour to be had
Color liquid, and the graduation mark for marking liquid level is carved on the panel among U-tube.
3. a kind of Joule Law Experiment instrument according to claim 1, it is characterised in that the pallet is fixed on panel,
Flask 1 and flask 2 are placed on pallet, and the flask body back side has part to imbed in panel, and bottleneck is fixed on by retainer plate
On panel, above the pallet and back side of flask is lined with heat-preservation cotton, and flask 1 and flask 2 are the thick mouth high temperature resistant flasks of same size,
Bottleneck stoppers sealing with bakelite plug, fixed there are two resistor wiring column beyond the Great Wall in bakelite, is terminated with resistance wire under binding post, can be with
The resistance wire for replacing different resistance values according to actual needs, in bakelite, there are also one is long and the other is short two gas-guide tubes beyond the Great Wall, wherein short leads
Tracheae is stoppered with air exchanging plug, and long gas-guide tube with rubber tube with U-tube by being connected, and flask 1 is connected with U-tube 1, flask 2
Be connected with U-tube 2, bakelite plug, rubber tube, air exchanging plug, gas-guide tube, U-tube 1, U-tube 2, resistance wire R1, resistance wire R2, burn
Bottle 1 and flask 2 can be dismantled or be replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910287489.8A CN109817069A (en) | 2019-04-11 | 2019-04-11 | A kind of Joule Law Experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910287489.8A CN109817069A (en) | 2019-04-11 | 2019-04-11 | A kind of Joule Law Experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109817069A true CN109817069A (en) | 2019-05-28 |
Family
ID=66611628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910287489.8A Withdrawn CN109817069A (en) | 2019-04-11 | 2019-04-11 | A kind of Joule Law Experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109817069A (en) |
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2019
- 2019-04-11 CN CN201910287489.8A patent/CN109817069A/en not_active Withdrawn
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Application publication date: 20190528 |