JEE Mains 02-Sep-2020 Shift 2 Solved Paper

Section: Physics

Question : 4 of 75

Marks: +1, -0

A potentiometer wire PQ of 1m length is connected to a standard cell E1. Another cell E2 of emf 1.02V is connected with a resistance 'r' and switch S (as shown in figure). With switch S open, the null position isobtained at a distance of 49cm from Q. The potential gradient in the potentiometer wire is :

[2 Sep 2020 Shift 2]

0.02 V/cm
0.04 V/cm
0.01 V/cm
0.03 V/cm

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