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In the circuit shown below, the internal...

In the circuit shown below, the internal resistance of the cell is negligible. The distance of the slider from the left-hand end of the slide wire is l. The graph shows the variation with l of the current I in the cell.

Value of the resistance R is:

A

`32 Omega`

B

`35Omega`

C

`40Omega`

D

`45Omega`

Text Solution

Verified by Experts

At=l=0cm, I=37.5mA
E-IR=xl
By putting values of l and l
`E=37.5 times 10^-3R`
`R=E/(37.5times 10^-3)=32 Omega or for l=100 cm, I=-150mA,`
`6-1.2-0.15R=0`
Given R=32 ohm
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