Question

In the circuit given below the instrument B reads 0.93 and the instrument A reads 1.80 in their respective SI units
The value of unknown resistor will be:
(1) 0.51
(2) 1.030
(3) 1.93 0
(4) 19.30​

Answer 1

Ammeter are connected in Series so B is an ammeter

Voltmeter are connected in parallel, so A is an Voltmeter.

I= 0.93AV=1.80VFrom Ohm's lawV=IRR=VI=1.800.93R=1.935 ohms