A galvanometer having a resistance of and 30 division on both sides has figure of…
PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
A galvanometer having a resistance of 20Ω and 30 division on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter upto 15 volt, is:
(1) 100Ω
(2) 120Ω
(3) 80Ω
(4) 125Ω