The following instruments are available in a laboratory : Milliammeter A1 : range 0-300 mA and least count 10 mA Milliammeter A2 : range 0-200 mA and least count 20 mA Voltmeter V1 : range 0-5 V and least count 0.2 V Voltmeter V2 : range 0-3 V and least count 0.3 V Out of the above instruments, which pair of milliammeter and voltmeter would be the best choice to determine the equivalent resistance of two resistors connected in series ? (a) Milliammeter A1 and Voltmeter V1 (b) Milliammeter A2 and Voltmeter V2 (c) Milliammeter A1 and Voltmeter V2 (d) Milliammeter A2 and Voltmeter V1
Milliammeter A1 and voltmeter V1 gives maximum measuring range with lowest least count. So, the combination of these two is best for two resistances connected in seires.
Correct option is (a).