If voltage in a circuit is constant, the current can be cut to half of its original value by changing the resistance to?

Twice its original value.

Explanation:

From Ohm's law, current is directly proportional to the voltage.

I ∝ V

V = I R

Keeping voltage constant, Current is inversely proportional to resistance.

I ∝ 1/R

When current is cut to half the original, the resistance should be increased to twice its original value to keep the voltage constant.

the correct answer is option b

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