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7nadin3 [17]
3 years ago
12

How must the voltage across a resistor change to reduce the current in the

Physics
1 answer:
Grace [21]3 years ago
5 0

Voltage must decrease by a factor of 3 to reduce the current in the resistor by a factor of 3

Answer: Option A

<u>Explanation:</u>

According to ohms law, the voltage passed in a circuit will be directly proportional to the current flow in the circuit. So the resistance of the resistor will act as proportionality constant in ohms law. Let us consider V as original voltage producing a current I in resistor of resistance R. Then according to ohms law:

                    V=I \times R

Now the revised current flow in the circuit is reduced by a factor of 3, So the new current is \frac{I}{3} in the same resistance R, then the new voltage will be

                   V^{\prime}=\frac{I \times R}{3}=\frac{V}{3}

So, the voltage must be reduced by a factor of 3 to reduce the current in the resistor by a factor of 3.        

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5 0
4 years ago
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olchik [2.2K]

Answer:

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Explanation:

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Thus;

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8 0
3 years ago
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4 years ago
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