A galvanometer of coil resistance 1Ω is converted into voltmeter by using a resistance of 5Ω in series and another identical galvanometer is converted into ammeter by using a shunt of 1Ω . Now ammeter

Question

A galvanometer of coil resistance 1Ω is converted into voltmeter by using a resistance of 5Ω in series and another identical galvanometer is converted into ammeter by using a shunt of 1Ω . Now ammeter and voltmeter connected in circuit as shown, find the ratio of reading of voltmeter (in volts) and ammeter (in amperes).

TestHub · Accepted Answer

The circuit according to question will be

It can be redrawn as

The circuit according to the question will be:

Let the ammeter reading be $i$ . Then, $i_{1} = i /3$ clearly.

The voltmeter reading is $V = i_{1} \times 3 Ω = i /3 \times 3 = i$ .

So, $V / i = 1$ .

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