Categories: Physics WAEC

A moving-coil galvanometer which gives a full-scale on deflection with 0.005A is converted to a voltmeter reading up to 5V using an external resistance of 975Ω. What is the resistance of the metre?

A. 0.25Ω
B. 2.50Ω
C. 25.00Ω
D. 250.00Ω

Correct Answer:

Option C = 25.00Ω

Explanation

Using: E = I(R+r)

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