The resistance in the two arms of the meter bridge are $5Ω$ and $RΩ,$ respectively. When the resistance $R$ is shunted with an equal resistance, the new balance point is at $1.6{l}_{1} .$ The resistance ‘ $R$ ’ is:

Question

The resistance in the two arms of the meter bridge are

5Ω

and

RΩ,

respectively. When the resistance

R

is shunted with an equal resistance, the new balance point is at

1.6{l}_{1} .

The resistance ‘

R

’ is:

The resistance in the two arms of the meter bridge are 5Ω and RΩ, respectively. When the resistance R is shunted with

Quantrex Academy · Accepted Answer

Correct answer: B. 15Ω

The resistance of meter bridge is directly proportional to the length of the bridge wire. (5)/(R) = l _ 1 100 - l _ 1 (5)/(R / 2) = 1.6 l _ 1 100 - 1.6 l _ 1 Solving l _ 1 = 25cm and R = 15Ω

The resistance in the two arms of the meter bridge are 5Ω and RΩ,...

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