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Q.

A wire of resistance R and length L is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be:

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a

125R

b

5 R

c

25 R

d

15R

answer is C.

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Detailed Solution

Resistance of each part is R5
After connecting in parallel Rnet=R55=R25

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A wire of resistance R and length L is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be: