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 .t.. If the temperature of water is increased, the new balancing length is

Options

A. `gt l`
B. `lt l`
C. `=l`
D. `=0`

Answer

A

Explanation

According to the question,
`(R_("unknown"))/(R_("standard"))=(1)/((1-1))`
If temperature increases than resistance increases. Hence the new balancing is greater than 1.