MEDIUM
7th CBSE
IMPORTANT
Earn 100
Here, the current-carrying wire behaves like a _____.
73.68% studentsanswered this correctly
Important Questions on Electric Current and Its Effects
EASY
7th CBSE
IMPORTANT
No appliances work when the circuit is _____(open/closed).
EASY
7th CBSE
IMPORTANT
Flow of large current due to direct contact of a live and a neutral wire is called _____ (short-circuit/ overload).
EASY
7th CBSE
IMPORTANT
A magnet produced by passing an electric current through a coil of insulating wire wound around a soft iron is called _____.
(Permanent magnet/ electromagnet)
EASY
7th CBSE
IMPORTANT
Match the following:
| Column A | Column B | ||
| Tungsten | A | High resistance | |
| Nichrome wire | B | Bulb | |
| Soft iron | C | Low resistance | |
| Mica | D | Electric iron | |
| Copper | E | Electromagnet |
EASY
7th CBSE
IMPORTANT
Name any four insulators.
EASY
7th CBSE
IMPORTANT
Name the materials used for making:
(a) filament of an electric bulb
EASY
7th CBSE
IMPORTANT
Name the materials used for making:
(a) heating element of an electric heater
EASY
7th CBSE
IMPORTANT
Name any four electrical appliances in which the heating effect of electric current is utilised.
