MEDIUM
7th CBSE
IMPORTANT
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A fuse is made up of a wire which has a melting point.

 

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Important Questions on Electric Current and its Effects

EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q II
An electric fuse acts on the _____ (magnetic/heating) effect of the electric current.
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q III
The switch in the 'ON' position shows an open circuit.
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q III
Fuse wires that melt and break easily have no use in electric circuits.
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q III
An electromagnet is a permanent magnet.
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q III
Electric fuse is based on the heating effect of current.
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q III
An electromagnet attracts all pieces of wood.
MEDIUM
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q IV
What is the SI unit of electric current?
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q IV
Name the instrument used to measure electric current.