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Q.

Select the correct statement
I) Bending of a conductor effects electrical resistance.
II) When the radius of a copper wire is doubled, its specific resistance gets increased.
III) Electric potential is analogous to temperature in electricity.
IV) Electric current is analogous to temperature in electricity.

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a

I and III are correct

b

I, II and III are correct

c

I, II are correct

d

I, II, IV are correct

answer is D.

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Detailed Solution

I) resistance depends on shape of the material
II) specific resistance is independent of dimensions
III) Electric potential is analogues to temperature in electricites
IV) Electric current is analogues to heat transfer in electricities

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