how can Ohm's law be verified experimentally
Anonymous:
Big question ..................whom do u mar brainliest
Answers
Answered by
15
Hi Deepanshi @_@
__________________________________________________________
Ohm's law used to defined the relation between potential difference , current and resistance in a conductor
i.e. V=IR
We can verify it by the following activity....
____________________________________________________________
Material required :
@A resistor of about 5 Ω
@An ammeter
@A Voltmeter
@Some Dry Cells of 1.5 V each
@A plug key
@Connecting wires
@A piece of sand paper
____________________________________________________________
Procedure :
@Arrange the apparatus
@Clean the ends of the connecting wires with sand paper
@All connections must be neat and tight
@Connect the ammeter and voltmeter
@Determine the zero error and least count of the ammeter and voltmeter
@Adjust the rheostat to pass a low current
@Adjust the rheostat to get a small deflection in ammeter and voltmeter
@Record the readings of the ammeter and voltmeter
@Plot a graph with V along x-axis and I along y-axis.
@The graph will be a straight line which verifies Ohm's law.
___________________________________________________________
__________________________________________________________
Ohm's law used to defined the relation between potential difference , current and resistance in a conductor
i.e. V=IR
We can verify it by the following activity....
____________________________________________________________
Material required :
@A resistor of about 5 Ω
@An ammeter
@A Voltmeter
@Some Dry Cells of 1.5 V each
@A plug key
@Connecting wires
@A piece of sand paper
____________________________________________________________
Procedure :
@Arrange the apparatus
@Clean the ends of the connecting wires with sand paper
@All connections must be neat and tight
@Connect the ammeter and voltmeter
@Determine the zero error and least count of the ammeter and voltmeter
@Adjust the rheostat to pass a low current
@Adjust the rheostat to get a small deflection in ammeter and voltmeter
@Record the readings of the ammeter and voltmeter
@Plot a graph with V along x-axis and I along y-axis.
@The graph will be a straight line which verifies Ohm's law.
___________________________________________________________
thNkuuu..so..muCh..but..i..wnT..to Say..thAt..it iS in onLy 2maRks nd 4thiS i think itSs..to..lonGg..may..bee
umm... dear do u like it ?
or u want any different answer ?
i dont want any differnt one but ....mmm...i want iT for 2..markss...willl..u..plZz...giVvee...again..plZzz
But dear you have to perform an activity to prove it
and in my book it is soooo long I cutted it out and give u a short one
ok..then...
but..m really thnkfull to u gor ur suggestion nd answer
:D ur welcome dear
Answered by
10
hey friend.
Connect the resistor on the breadboard.Now connect the ammeter in series with this resistor. The ammeter is connected to measure the amount of current flowing through this circuit.
Connect the live terminal (positive terminal) of DC Power Supply with one end of the resistor. Connect the ground terminal with the black probe of an ammeter.
Now switch on the DC Power Supply and apply 0V.
Now the ammeter will display 0V.
Now increase the value of voltages forms 0 to 10 V.
Keep on measuring the values of current for all these values. The report will look like.
The ideal and almost 90% of non-ideal cases follow the same readings as shown in the figure.
Finally, it’s time to plot graph.
Take current across x-axis and the potential across the y-axis.
The plot will look like.
The above experiment and graph verify the equation V=IR. Pick any values of readings from table or graph and verify it. As an example imagine the value 4V. For 4V the current is 0.4mA. Whereas resistor is of 10k
Now From
V = IR
4V = 10 mA* 0.4 kΩ
4V = 4V
In the table and graph, all values followed are verified and are correct in 90% of the cases, but one may experience a difference in behavior.
There are a few factors which may cause the deviation from these Ohm’s Observations. Such factors may be the temperature, the physical conditions of apparatus and the quality of resistors which are being used.
______________________________
hope it will help u
Connect the resistor on the breadboard.Now connect the ammeter in series with this resistor. The ammeter is connected to measure the amount of current flowing through this circuit.
Connect the live terminal (positive terminal) of DC Power Supply with one end of the resistor. Connect the ground terminal with the black probe of an ammeter.
Now switch on the DC Power Supply and apply 0V.
Now the ammeter will display 0V.
Now increase the value of voltages forms 0 to 10 V.
Keep on measuring the values of current for all these values. The report will look like.
The ideal and almost 90% of non-ideal cases follow the same readings as shown in the figure.
Finally, it’s time to plot graph.
Take current across x-axis and the potential across the y-axis.
The plot will look like.
The above experiment and graph verify the equation V=IR. Pick any values of readings from table or graph and verify it. As an example imagine the value 4V. For 4V the current is 0.4mA. Whereas resistor is of 10k
Now From
V = IR
4V = 10 mA* 0.4 kΩ
4V = 4V
In the table and graph, all values followed are verified and are correct in 90% of the cases, but one may experience a difference in behavior.
There are a few factors which may cause the deviation from these Ohm’s Observations. Such factors may be the temperature, the physical conditions of apparatus and the quality of resistors which are being used.
______________________________
hope it will help u
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wlcm
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