Question

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For class 10
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Answer 1

Answer:

The potential difference, V. across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same. This is called Ohm's law.

In other words

$V \: \alpha \: I\\ \\ \frac{ V}{I} = constant$

Inorder to remove proportionality we use constant R

$\frac{V}{I} = R \\ \\ V = IR$

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Answer 2

Answer:

For any circuit element, the power is equal to the voltage difference across the element multiplied by the current.

By Ohm's Law, V = IR, and so there are additional forms of the electric power formula for resistors.

Power is measured in units of Watts (W), where a Watt is equal to a Joule per second (1 W = 1 J/s).

Explanation:

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