GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It increases by a factor of five.
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It decreases by a factor of five.
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It stays the same.
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Not enough information
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Detailed explanation-1: -3. If the voltage across a fixed value of resistance is increased five times, what does the current do? It increases by a factor of five.
Detailed explanation-2: -So, the current becomes one-fourth of the initial current when resistance becomes four times.
Detailed explanation-3: -So, an increase in the voltage will increase the current as long as the resistance is held constant. Alternately, if the resistance in a circuit is increased and the voltage does not change, the current will decrease.
Detailed explanation-4: -Ohm’s law states that current is directly proportional to voltage but inversely proportional to resistance. At constant resistance, current increases as voltage increases and vice versa. At constant voltage, current decreases as resistance increases and vice versa.
Detailed explanation-5: -By doubling the voltage across a resistor, one can obtain double the current of initial value.