Student Login

Home›Chapters›Current Electricity PYQs›Potentiometer›Question 48

JEE Main 2022 (24 Jun, Shift 1) · Potentiometer

Potentiometer question from JEE Main 2022 (24 Jun, Shift 1)

Q48JEE Main 2022 · 24 JUN · SHIFT 1Easy

Potentiometer

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.

Numerical answer type. Work it out, then open the answer.

Show answer and solution

Answer: 25

$\frac{E_1}{E_2} = \frac{l_1}{l_2} = \frac{3}{2}$ .
$l_2 = 75 \times \frac{2}{3} = 50\ \text{cm}$ .
Difference $= 75 - 50 = 25\ \text{cm}$ .

Report a mistake

More questions on Potentiometer

As shown in the figure, a potentiometer wire of resistance 20 Ω and length 300 cm is…JEE Main 2022 (28 Jul, Shift 1)
A potentiometer wire of length 300 cm is connected in series with a resistance 780 Ω and…JEE Main 2022 (26 Jul, Shift 2)
A potentiometer wire of length 10 m and resistance 20 Ω is connected in series with a 25…JEE Main 2022 (24 Jun, Shift 2)
The circuit diagram of potentiometer used to measure the internal resistance of a cell…JEE Main 2022 (30 Jun, Shift 1)
A cell, shunted by a 8 Ω resistance, is balanced across a potentiometer wire of length 3…JEE Main 2022 (27 Jun, Shift 1)
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of…NEET 2021
In a potentiometer experiment, when three cells A, B and C are connected in series, the…MHT CET 2021 (24 Sep, Shift 1)
In potentiometer experiment, cells of e.m.f. ' E₁ ' and ' E₂ ' are connected in series…MHT CET 2021 (23 Sep, Shift 1)