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Electric current and it's effects

Authored by Rahul Chakraborty

Physics

7th Grade

NGSS covered

Used 75+ times

Electric current and it's effects
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When current is switched 'on' of a bulb it converts _______ energy into _______ energy.

Electrical, heat

Electrical, light

Electrical, mechanical

Electrical, sound

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The magnitude of magnetism produced by an electric current in a wire depends upon- (a) Increases with an increase in the strength of electric current (b) Decreases, as the distance from the wire increases

Both a, b

Only a

Only b

None

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A common household device, that do not use an electromagnet in its working, is-

The electric bell

Geyser

Telephone

Loud speaker

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When electric current flows through the metal filament of the bulb it gets heated to very high temperature and becomes______ hot and start emitting _______.

White, light

Red, light

White, heat

Red, heat

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When electricity flows through heating coil it becomes ________ hot and gives out _______ energy, which is to put in practical use.

Red, heat

White, heat

Red, light

White, light

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The most suitable material for making the core of an electromagnet is:

Iron

Aluminum

Brass

Steel

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The magnetic effect of electric current was discovered by-

Maxwell

Darwin

Oersted

Newton

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