The best combination of voltmeter and ammeter for finding the equivalent resistance of the resistors in parallel would be
A. ammeter A1 and voltmeter V1.
B. ammeter A1 and voltmeter V2.
C. ammeter A2 and voltmeter V1.
D. ammeter A2 and voltmeter V2.
Answer:D
The best combination of voltmeter and ammeter for finding the equivalent resistance of the resistors in parallel would be
A. ammeter A1 and voltmeter V1. B. ammeter A1 and voltmeter V2. C. ammeter A2 and voltmeter V1. D. ammeter A2 and voltmeter V2.
Explanation: The overall range of voltage is from 0 to 1.5 V and that of current is from 0 to 1.5/3 A = 0.5 A. We therefore prefer, instruments that cover these ranges and also have a better least count.