what is the change in potential difference if current is double and resistance is halved
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If R is halved and V is doubled I.e. Current through a resistance is directly proportional to the potential difference across it and inversely proportional to the magnitude of the resistance. Hence current will increase 4 times. According to ohm's law voltage applied is directly proportional to the current.
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Explanation:
If the resistance is halved, then R becomes R/2. Thus, if the potential difference across the resistor is doubled and the resistance of the resistor is halved. The current passing through the resistor becomes 4 times the initial current.
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