1. Tardigrade
  2. Question
  3. Physics
  4. A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 × 10-4 A passes through it, its needle (pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of:

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A galvanometer, whose resistance is $50\, ohm$, has $25$ divisions in it. When a current of $4 \times 10^{-4}$ A passes through it, its needle (pointer) deflects by one division. To use this galvanometer as a voltmeter of range $2.5\, V$, it should be connected to a resistance of:

JEE MainJEE Main 2019Moving Charges and Magnetism

Solution:

$I_g \, = \, 4 \, \times \, 10^{-4} \, \times \, 25 \, = \, 10^{-2} A$
$2.5 \, = \, (50+R) 10^{-2 } \, \, \therefore \, R \, = \, 200 \Omega$

Solution Image