What is a solenoid? Give one use of it.

Important Questions on Electric Current and its Effects

MEDIUM

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q V

How does electromagnet work in an electric bell?

MEDIUM

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q VI

Explain the heating effect of electric current with an activity.

HARD

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q VI

What is magnetic effect of electric current? Describe an activity to demonstrate it.

HARD

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q VI

Draw a labelled diagram of an electric bell. Explain its working.

MEDIUM

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q VI

Distinguish between an open and a closed circuit using circuit diagrams.

MEDIUM

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q VI

Who discovered magnetic effect of the current? How does electrical cell produce electric current?

EASY

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>Brain Teasers

Why are the electric bulbs filled with a gas like argon?

MEDIUM

7th CBSE

IMPORTANT

SCIENCE ROUTE 7>Chapter 13 - Electric Current and its Effects>Brain Teasers

A bird can enjoy sitting on an electric line easily. But if a monkey swings on it so that it touches another parallel line, it gets killed instantly. Justify.