Question

33. A piece of wire of resistance 20ohm is drawn out so that its length is increased to twice its original length.
Calculate the resistance of the wire in the new situation.
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Answer 1

Answer: 40 ohm

Explanation:

Since the length of wire is directly proportional to the resistance of the wire, so when length is doubled resistance is also doubled. So resistance= 2*20 ohm=40 ohm

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