JEE Main 2022 · 24 Jun · Shift 1 · Physics Q59

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PhysicsInteger+4 / -1Question 59 of 90

In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now replaced by another cell of unknown emf. If the ratio of the emf's of two cells respectively is 3 : 2, the difference in the balancing length of the potentiometer wire in above two cases will be ______ cm.

Your answer

Answer and worked solution

Official answer: 25

Balancing length is proportional to emf. $\dfrac{l_1}{l_2}=\dfrac32$ with $l_1=75$ cm, so $l_2=50$ cm.

Difference. $75-50=25$ cm.

Answer: 25

Topics:Potentiometer

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JEE Main 2022 · 24 Jun · Shift 1, Physics question 59