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In meter brid...

Question

In meter bridge experiment, with a standard resistance in the right gap and a resistance coil dipped in water (in a beaker) in the left gap, the balancing length obtained is ' $L$ '. If then temperature of water is increased the new balancing length is

A

> 1

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B

< 1

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C

= 0

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D

= 1

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Solution

The correct option is D $> 1$
As the temperature is increased the resistance will also increase
$\frac{R_{1}}{R_{2}} = \frac{L}{100 - L}$
as $R_{1}$ will increase ,so balancing point will also increase.
Hence the correct option is A.

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