Question

The following instruments are available in a laboratory :
(i) Milliammeter `A_1` of range `0.300 mA` and least count `10 mA`
Milliammeter `A_2` of range `0.200 mA` and least count `20 mA`
Voltmeter `V_1` of range `0.3 V` and least count `0.3 V`
Which pair of instruments would be the best choice for carrying out the experiment to determine the equivalent resistance of two resistors connected in series ?

Answer 1

Milliammeter `A_1` and voltmeter `V_1` since they have the highest ranges `(0-300 mA, 0-5 V)` and lowest least counts `(10 mA, 0.2 V)`.