JEE Main 2020 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 8 January 2020, Shift 1, Physics Q24

Question 24 of 75 in this shift, Physics question 24 of 25, Section B.

Four resistances of 15

\Omega

, 12

\Omega

, 4

\Omega

and 10

\Omega

respectively in cyclic order to form Wheatstone's network. The resistance that is to be connected in parallel with the resistance of 10

\Omega

to balance the network is ______

\Omega

Official answer

10.00

NTA final key (Jan 2020).

Chapter: Current Electricity
Topic: Wheatstone Bridge
Idea tested: Balanced Bridge Equation

Same topic in other shifts

All Wheatstone Bridge questions

6 Apr 2026, Shift 2 · Q48A moving coil of galvanometer when shunted with 2 $\Omega$ resistance gives a full scale deflection for a current of 500 mA. When a…MediumNumerical value
7 Apr 2025, Shift 1 · Q36A wire of resistance R is bent into a triangular pyramid as shown in figure with each segment having same length. The resistance between…MediumDiagram basedHas a figure
9 Apr 2024, Shift 1 · Q50A galvanometer has a coil of resistance $200\ \Omega$ with a full scale deflection at $20\ \mu$ A. The value of resistance to be added to…EasySingle correct
29 Jan 2024, Shift 1 · Q42A galvanometer having coil resistance $10\,\Omega$ shows a full scale deflection for a current of 3mA. For it to measure a current of 8A,…EasySingle correct
29 Jan 2024, Shift 1 · Q50The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of $24\,\Omega$ is applied. The resistance…MediumSingle correct
31 Jan 2024, Shift 2 · Q49The resistance per centimeter of a meter bridge wire is $r$ , with $X\ \Omega$ resistance in left gap. Balancing length from left end is at…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.