MEDIUM
7th CBSE
IMPORTANT
Earn 100

Instead of a soft-iron core, if we wind a current carrying wire around a wooden pencil, would it still deflect a magnetic compass needle?

Important Questions on Electric Current and its Effects

EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Let's Answer>Q 1
An electric wire heats up when an electric current passes through it.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Let's Answer>Q 2
Two or more cells joined together form an electromagnet.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Let's Answer>Q 3
An electric toaster works on the heating effect of electric current.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Let's Answer>Q 4
An electric fuse wire is made of a material of very high melting point.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Let's Answer>Q 5
An electromagnet retains its magnetic effect even when the electric current in it is switched off.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Exercises>Q A
Which of these is a basic component of an electric circuit?
MEDIUM
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Exercises>Q A
Which of the following appliances function because of the heating effect of current?
MEDIUM
7th CBSE
IMPORTANT
Science Horizons>Chapter 13 - Electric Current and its Effects>Exercises>Q A
Which of the following acts as a safety device to prevent a large amount of electric current from flowing through a circuit?