MEDIUM
7th CBSE
IMPORTANT
Earn 100

What is the heating effect of electric current?

Important Questions on Electric Current and its Effects

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 3
What is a fuse?
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 3
What is the magnetic effect of current? How was it discovered?
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 3
What are electromagnets?
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 3
What is a solenoid?
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 3
List some uses of electromagnets.
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 4
Draw and describe an electric circuit consisting of a battery of four cells, a switch, conducting wires, and a bulb.
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 4

Give reasons for the following:

Household electric wires are covered with plastic or rubber.

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 15 - Electric Current and its Effects>Put on your THINKING CAP!>Q 4

Give reasons for the following:

An electrician only replaces a blown off fuse with a wire prepared from tin and lead alloy (63% of tin, 37% of lead).