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Two Parallel Currents

Q. Can we use...

Question

Q. Can we use ammeter or voltmeter instead of Galvonometer in Faraday's experiment?

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Solution

Yes, a galvanometer can be used as a voltmeter by connecting it in series with a large resistance. The same galvanometer can also be used an ammeter by placing it in parallel with a small resistance R, called the shunt resistance.

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Q. A galvanometer may be converted into ammeter or voltmeter. In which of the following cases the resistance of the device will be the largest ? (Assume maximum range of galvanometer

= 1 mA

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Q. What pre-information would you require to convert a galvanometer into ammeter or voltmeter?

Q. A galvanometer has a resistance of

50 Ω

and a full scale deflection current of

50 μ A

. It can be used as a volmeter or as a higher range ammeter provided that a resistance is added to it. Choose correct options.

Q. Explain how can a moving coil galvanometer be converted
(i) an ammeter
(ii) a voltmeter of given ranges

Q. Assertion : Out of galvanometer, ammeter and voltmeter, resistance of ammeter is lowest and resistance of voltmeter is highest
Reason : An ammeter is connected in series and a voltmeter is connected in parallel, in a circuit

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