EASY
7th CBSE
IMPORTANT
Earn 100

Give a reason for the following:
An electric current does not flow in a circuit when the switch is an open mode.

Important Questions on Electric Current and Circuits

EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 1
Give a reason for the following:
An electric bulb feels hot to touch after it has been on for some time.
EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 1
Give a reason for the following:
Fuses are a necessary evil.
EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 1
Give reasons for the following:
The wire of an electric fuse is made up of a material that melts easily.
MEDIUM
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 2
Differentiate between open and closed circuit.
MEDIUM
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 2
Differentiate between: Miniature circuit breaker (MCB) and Fuse.
MEDIUM
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 3
What is a heating effect of an electric current?
HARD
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 1
What is the role of the fuse in an electric circuit? Explain.
MEDIUM
7th CBSE
IMPORTANT
The Science Hub>Chapter 13 - Electric Current and Circuits>Exercises>Q 2
Draw the diagram of an electric circuit using symbols representing a cell, a plug key, resistance, and an electric lamp.