MEDIUM
7th Jammu and Kashmir Board
IMPORTANT
Earn 100

Why does an electric bulb get hot if it is kept 'ON' for a little while?

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
Name three appliances that use heating effect of electric current.
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 electric fuse?
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?