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Standard XII

Physics

Galvanometer

Choose the co...

Question

Choose the correct options regarding a galvanometer.

It measures current

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It is marked with positive and negative polarity

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The deflection in the galvanometer is proportional to the current

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Zero is marked at the middle of instrument

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Solution

The correct options are
C Zero is marked at the middle of instrument
D The deflection in the galvanometer is proportional to the current
Galvanometer is a device whose deflection is proportional to the current and its zero mark is at the middle. It is used to measure the direction of current.

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Q. A galvanometer has a resistance of

60 Ω

and has

50

divisions. A current of

1 m A

is passed and it gives full-scale deflection. When shunt of

2.5 Ω

is connected in parallel with the galvanometer, the deflection reduces, to

10

divisions for the same current. Find the maximum current that can be measured with the galvanometer converted into an ammeter.

Q. 100 mA current gives a full-scale deflection in a galvanometer of

2 Ω

. The resistance connected with the galvanometer to convert it into a voltmeter to measure

5 V

Q. A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below. (G - galvanometer)

Select the correct option regarding polarity of the magnets and the deflection of the galvanometer.

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Choose the correct options regarding a galvanometer.

The correct options are C Zero is marked at the middle of instrument D The deflection in the galvanometer is proportional to the currentGalvanometer is a device whose deflection is proportional to the current and its zero mark is at the middle. It is used to measure the direction of current.

The correct options are
C Zero is marked at the middle of instrument
D The deflection in the galvanometer is proportional to the current
Galvanometer is a device whose deflection is proportional to the current and its zero mark is at the middle. It is used to measure the direction of current.