MEDIUM
7th CBSE
IMPORTANT
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An iron rod cannot be made an electromagnet if the coil is connected to an AC source.

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Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
Greater the current in a copper wire, hotter it will be.
MEDIUM
7th CBSE
IMPORTANT
Electromagnets can be used to remove iron splinters from body parts.
EASY
7th CBSE
IMPORTANT

Electrical fuse is based on the magnetic effect of current.

MEDIUM
7th CBSE
IMPORTANT

Complete the word puzzle with the help of given clues.

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ACROSS
1. Circuit through which current flows (13).
2. Device used for lifting heavy loads (13).
3. U-shaped soft iron piece used in electric bell (8)
4. Material used to make electromagnet (8).
5. Filament of an electric lamp (8) DOWN
6. A combination of two or more cells (7).
7. A safety device in electrical circuits against high currents (4).
8. An electric appliance based on heating effect of current (6).