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Resistance

State whether...

Question

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

A

True

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B

False

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Solution

The correct option is B False
In order to convert a Galvanometer into an Ammeter, a very low resistance known as "shunt" resistance is connected in parallel to Galvanometer. As Galvanometer is a very sensitive instrument therefore it can't measure heavy currents. By connecting resistance in parallel the current gets divided in two pathways.

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Similar questions

Q. A galvanometer has a resistance of

16 Ω

.It shows full scale deflection, when a current of

20 m A

is passed through it. The only shunt resistance available is

0.06 Ω

which is not appropriate to convert a galvanometer into an ammeter. How much resistance should be connected in series with the coil of galvanometer so that the range of ammeter is

8 A ?

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. The resistance of a galvanometer is 100

Ω

Ω

is connected to it to convert it into an ammeter. The internal resistance of the ammeter is

Q. A galvanometer (coil resistance

99 Ω

) is converted into a ammeter using a shunt of

1 Ω

and connected as shown in the figure

(i)

. The ammeter reads

3 A

. The same galvanometer is converted into a voltmeter by connecting a resistance of

101 Ω

in series. This voltmeter is connected as shown in figure

(i i)

. Its reading is found to be

4 / 5

of the full scale reading. Find the range of the ammeter and voltmeter

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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