Question

In metre 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 the temperature of water is increased, the new balancing length is

• A.

  1

• B. < 1
• C. 1
• D. 0

Answer 1

Answer: (A)

1

Answer 2

According to the quastion,
$\frac{R_{\text {unkown }}}{R_{\text {standard }}}=\frac{l}{(1-l)}$
If temperature increases than resistance increases. Hence the new balancing is greater than 1