A wire of length l and resistance R is stretched so that its length is doubled and the area of cross - section is halved. How will its :-
(1) Resistance Change (2)Resistivity Change
(1) Resistance Change (2)Resistivity Change
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Answer:
The resistance of a wire of length L and resistance R is given by : If a wire of length L and resistance R is stretched so that its length is doubled and the area of cross-section is halved. It means, L' = 2L and A' = A/2.
Explanation:
Op no.2.
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