Q. A voltmeter has resistance of $2000\ ohm$ and it can measure upto $2V.$ If we want to increase its range to $10\ V,$ then the required resistance in series will be
A) $2000\ \Omega$
B) $4000\ \Omega$
C) $6000\ \Omega$
D) $8000\ \Omega$
Explanation
(d) Here $n = \frac{10}{2} = 5$
$\therefore R = (n - 1)G = (5 - 1)2000 = 8000\ \Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.