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A meter bridge is used to determine the resistance of an unknown wire by measuring the balance point length . If the wire is replaced by another wire of same material but with double the length and half the thickness, the balancing point is expected to be

a)

b)

c)

d)



Question ID - 152011 | SaraNextGen Top Answer

A meter bridge is used to determine the resistance of an unknown wire by measuring the balance point length . If the wire is replaced by another wire of same material but with double the length and half the thickness, the balancing point is expected to be

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

In a meter bridge the ratio of two resistances is

Where  and  are balancing lengths.

Resistance 

In material remains same

Given, 

Therefore, the new balancing point is expected to be 8 .

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