EASY
7th Jammu and Kashmir Board
IMPORTANT
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Nowadays, we use electric buzzers and music bells, which work on a principle different from that of the electric bell described here. Buzzers are of different types. Can you think of some places where you use electric buzzers?

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>LET’S ANSWER>Q 1
An electromagnet attracts a safety pin even when the current is turned off.
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q 2
The strength of an electromagnet does not depend on the number of turns on the coil wrapped around it.
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q 3
An electromagnet is used in a loudspeaker to amplify signals.
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q 4
In an electric bell, the hammer hits the gong when the electromagnet attracts the soft iron strip.
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q 5
In an electric bell, when the soft iron strip gets attracted to the electromagnet, It gets detached from the hammer.
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q A
A circuit diagram is 
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q B
When an electric current passes through a wire, the wire gets hot. This is called
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>EXERCISES>Q B
An electrical fuse is