JEE Main 2019 — Experimental Physics Question with Solution
JEE Main 2019 (11 Jan Shift 2)
Question
In the experimental set up of metre bridge shown in the figure, the null point is obtaine data distance of from
A. If a resistor is connected in series with the null point shifts by . The resistance that should be connected in parallel with such that the null point shifts back to its initial position is
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Initially at null deflection $\frac{\mathrm{R}_{1}}{\mathrm{R}_{2}}=\frac{2}{3}$$\ldots(\mathrm{i})$
Finally at null deflection, when null point is shifted ...(ii)
Solving equations (i) and (ii) we get
Now if required resistance is then
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 2019, 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.