EASY
7th CBSE
IMPORTANT
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Copper wire is coated with plastic to protect users from getting electric shock.

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Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
Rheostat is used in an electric circuit only to increase the current.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
An electric bell works because the current flows through its coil.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
A coil carrying current changes soft iron into permanent magnet.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
Nichrome is an alloy of lead and tin.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
Electromagnets are used to produce permanent magnets.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
A fuse of higher current rating is used for electric oven.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
The magnetic strength in a conductor decreases with increase in current.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 14 - Electric Current and Its Effects>EXERCISES>Q IV
Armature in an electric bell is a steel bar suspended in front of an electromagnet.