What is an electric fuse?

Important Questions on Electric Current and Circuits

EASY

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q C

Draw an electric fuse and explain briefly how it works.

MEDIUM

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q C

How can you show that an electric current has a magnetic effect?

EASY

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q C

What is an electromagnet?

EASY

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q C

Name two factors on which the strength of an electromagnet depends.

MEDIUM

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q C

Explain the working of an electric bell using diagrams.

MEDIUM

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>Think and Answer>Q 1

We have seen that the heating effect of electric current has been put to use in many appliances like toasters, heaters, etc. This kind of heating can also be a waste in many places. Can you think of one example?

MEDIUM

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>Think and Answer>Q 2

You know that the strength of an electromagnet depends on the amount of current flowing in the coil. Do you think the magnetic strength will increase/decrease if the amount of current in the coil is increased?

MEDIUM

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>Think and Answer>Q 3

Do you think all electrical fuses should have the same maximum current?