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Question
The potential difference across the ends of a resistor is _________ to the current through it.
The potential difference across the ends of a resistor is _________ to the current through it.
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Solution
The correct option is A directly proportional
According to Ohm's law, potential difference is directly proportional to current in the circuit. The constant of proportion is called resistance. Now we know resistance increases with the increase of temperature. So, we can conclude that the potential difference across the ends of a resistor is directly proportional to the current through it, provided its temperature remains the same.
According to Ohm's law, potential difference is directly proportional to current in the circuit. The constant of proportion is called resistance. Now we know resistance increases with the increase of temperature. So, we can conclude that the potential difference across the ends of a resistor is directly proportional to the current through it, provided its temperature remains the same.
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