A galvanometer with 50 divisions on the scale has a resistance of 25Ω. A current of $2 \times 10^{- 4} A$ gives a deflection of one scale division. To convert it into a voltmeter reading upto 25 volt, the additional series resistance required is of

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

$\frac{25}{99} Ω$

25Ω

25 x 99Ω

25 x100Ω

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

$\begin{array}{l} V = i_{g} (G + R) (\begin{matrix} ∵ i_{g} = 50 \times 2 \times 10^{- 4} = 10^{- 2} A \\ V = 25 v, G = 25 Ω \end{matrix}) \\ ∴ R = 25 \times 99 Ω \end{array}$

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Get Expert Academic Guidance – Connect with a Counselor Today!