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Q.

A resistance wire connected in the left gap of a meter bridge balances a 10Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3:2 . If the length of the resistance wire is 1.5 m, then the length of 1Ω  of the resistance wire is : 

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a

1.0×10−1m

b

1.5×10−1m

c

1.5×10−2m

d

1.0×10−2m

answer is A.

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Detailed Solution

R10=32 ⇒R=15Ω

length of the wire = 1.5 m

so, length of wire with 1 Ω resistance=1.515=1.0×10-1 m

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