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JEE MAIN 2020
02-09-2020 S2
Question
A potentiometer wire $P Q$ of $1 m$ length is connected to a standard cell $E_1$. Another cell $E_2$ of emf 1.02 V is connected with a resistance ' $r$ ' and switch $S$ (as shown in figure). With switch $S$ open, the null position is obtained at a distance of 49 cm from $Q$. The potential gradient in the potentiometer wire is
Select the correct option:
A
0.04 V/cm
B
0.01 V/cm
C
0.02 V/cm
D
0.03 V/cm
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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