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प्रश्न
State Ohm’s law.
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उत्तर
Ohm’s law states that electric potential difference across two points in an electrical circuit is directly proportional to the current passing through it. That is,
V~I
The proportionality constant is tne resistance (R) offered between the two points.
Hence, Ohm’s law is written as,
V = RI (or) V = IR
Where, V is the potential difference in volt (V), I is the current flow in ampere (A), R is the resistance in ohm (Ω)
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संबंधित प्रश्न
Potential difference is measured in _________ by using a ___________ placed in ___________ across a component.
What do you understand by the term "potential difference"?
A current of 5 amperes flows through a wire whose ends are at a potential difference of 3 volts. Calculate the resistance of the wire.
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| Potential differences, V (in volts) | : | 2.5 | 5.0 | 10.0 | 15.0 | 20.0 | 25.0 |
| Current, I (in amperes) | : | 0.1 | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 |
The following table shows current in Amperes and potential difference in Volts.
Which law will the graph prove? Explain the law.
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What do you understand by the resistance of a wire?
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