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Question

The correct relation between Potential difference across the ends of the wire (V) and electric current through the wire (I) is:


A

H directly proportional to I

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B

H directly proportional to (1/I)

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C

H directly proportional to I2

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D

H directly proportional to (1/I2).

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Solution

The correct relation between potential difference across the ends of the wire and electric current through the wire (I) is V = IR.
Ohm's law states that VI, and the constant of proportionality is the resistance (R) of the wire.


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