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Ammeter

If we want to...

Question

If we want to change a galvanometer into an ammeter extra resistance required is

A

low resistance in parallel

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B

high resistance in parallel

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C

low resistance in series

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D

high resistance in series

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Solution

The correct option is B low resistance in parallel
Since galvanometer is a very sensitive instrument that cannot measure heavy currents in order to convert a galvanometer into ammeter we have to put a low resistance called shunt in parallel to it so that most of the current goes through it , and our device can measure the accurate value.

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Similar questions

Q. Consider the following statements.

1

. A galvanometer is converted into an ammeter when we connect a low resistance in parallel.

2

. A galvanometer is converted into a voltmeter when we connect a high resistance in series.

3

. The conductivity of superconductor is infinite.
Which of the statement(s) given is/are correct?

Q. A moving coil galvanometer allows a full scale current of

10^{- 4} A

. A series resistance of

2 M Ω

is required to convert the above galvanometer into a voltmeter of range

0 - 5 V

. therefore the value of shunt resistance required to convert the above galvanometer into an ammeter of range

0 - 10 m A

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

Q. State whether given statement is True or False
To convert a galvanometer into an ammeter, a resistance is joined in series with it.

Q. A galvanometer of coil resistance

99 Ω

is converted into an ammeter using shunt of

1 Ω

and is connected as shown in Figure - 1. Ammeter reads 3A. If same galvanometer is converted into voltmeter by connecting a

101 Ω

resistance in series this voltmeter reads

\frac{4}{5}

of full scale reading as shown in Figure - 2

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