Question

Ohm'law and it's principle along with experimental verification
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Answer 1

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Ohm's law states the relationship between electric current and potential difference. The current that flows through most conductors is directly proportional to the voltage applied to it. Georg Simon Ohm, a German physicist was the first to verify Ohm's law experimentally.

Answer 2

Answer:

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Explanation:

• According to Ohm law on constant temperature the current passing throuconductor is directly proportional to the potential difference across it's end's.

• Mathematically we can write:I∝V or I=VR

• Here, constant R is known as the Resistance of given conductor.

Here, constant R is known as the Resistance of given conductor.For a given conductor it's Resistance is constant at a given temperature.

• One can verify Ohm's law by following Experiment:

• The circuit Diagram of the experimental set up has been shown.

• Here, XY is the Resistance wire, A an Ammeter and V an Voltmeter.

• A battery of 4 cells is being used as a current source and K is a Plug Key.

Step 1:.

• Initially use one cell only. Put Plug in Key K and note current an voltage by noting Ammeter and Voltmeter reading respectively. Let these be I

Initially use one cell only. Put Plug in Key K and note current an voltage by noting Ammeter and Voltmeter reading respectively. Let these be I 1 and V 1

and V 1

and V 1Step 2:.

• Then connect the two cell's in the circuit and note current I 2 and potential Difference V 2

and potential Difference V 2 across the resistance.

Step 3:.

• Similarly, take reading's with 3 and 4 cell's in the circuit. From the observation's we find that V 1 /I 1

=V 2 /I 2

=V 2 /I 2

=V 2 /I 2 =V 3 /I 3

=V 2 /I 2 =V 3 /I 3

=V 2 /I 2 =V 3 /I 3 =V 4 /I 4

=V 2 /I 2 =V 3 /I 3 =V 4 /I 4

=V 2 /I 2 =V 3 /I 3 =V 4 /I 4 =constant=R

=V 2 /I 2 =V 3 /I 3 =V 4 /I 4 =constant=RIf we Plot V-I Graph comes out to be a straight line. It experimentally verifies Ohm's law.

=V 2 /I 2 =V 3 /I 3 =V 4 /I 4 =constant=RIf we Plot V-I Graph comes out to be a straight line. It experimentally verifies Ohm's law.No, It doesn't hold under conditions like non-constant temperature and pressure.

=V 2 /I 2 =V 3 /I 3 =V 4 /I 4 =constant=RIf we Plot V-I Graph comes out to be a straight line. It experimentally verifies Ohm's law.No, It doesn't hold under conditions like non-constant temperature and pressure.It is true for conductors only.

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