JEE Main 2023PhysicsExperimental PhysicsHardNumerical

JEE Main 2023 — Experimental Physics Question with Solution

JEE Main 2023 (29 Jan Shift 1)

Question

In a metre bridge experiment the balance point is obtained if the gaps are closed by 2 Ω and 3 Ω. A shunt of X Ω is added to 3 Ω resistor to shift the balancing point by 22.5 cm. The value of X is ______.

Enter your answer

Show full solutionCorrect answer: 2
Correct answer
2

Step-by-step explanation

Case 1: No shunt is added

The initial balancing length l of the bridge is,

23=l100-l

⇒200-2l=3l⇒l=40 cm

Case 2: When shunt is added

The new balancing length is, l1=22.5+40=62.5 cm

So, 62.537.5=23X3+X

⇒X=2.

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Experimental Physics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2023, covering the Experimental Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.