A moving coil galvanometer has resistance `50 Omega` and it indicates full deflection at 4 mA current. A voltmeter is made using this galvanometer and a `5 k Omega` resistance. The maximum voltage, that can be measured using this voltmeter (in volts) will be __________.

Options

A. 40 V
B. 15 V
C. 20V
D. 10V

Answer

c

Explanation

`V= i_(g)(G+R)= 4 xx 10^(-3)`
(50+ 5000)= 20V