EASY
7th CBSE
IMPORTANT
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An electromagnet does not attract soft iron nails.

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Important Questions on Electric Current and Its Uses

EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q IV
A fuse is a safety device in a circuit based on the heating effect of electricity.
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q IV

A filament made of a metal with a very high melting point is a must for lighting effect of electricity.

EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q IV

The working of an electric bell is based on the magnetic effect of electricity.

EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q IV
A fuse is the application of magnetic effect of electric current.
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q IV
Electromagnets are temporary magnets.
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q V
Give reasons for the following: We make use of insulated wire as cable in our homes. 
 
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q V
Give reasons for the following: In a fuse, metal used is of a low melting point.
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>EXERCISES>Q V
Give reasons for the following: In a heating coil or a filament, metals used are with a very high melting point.