Question

A resistance wire connected in the left gap of a metre bridge balances a 10 Ω 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 1 Ω of the resistance wire is :

Answer 1

Answer:

Given,

R:S=3:2

S=10Ω

Ratio,

S

R

=

2

3

R=

2

3

×10=15Ω

The length of 1Ω wire is given by

l=

15

1.5

l=

10

1

⇒0.1 m or 1.0×10

−1

m

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