MEDIUM
7th Jammu and Kashmir Board
IMPORTANT
Earn 100

Draw the standard symbol used to represent an open switch.

Important Questions on Electric Current and Circuits

MEDIUM
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q (II)
Draw the standard symbol used to represent a closed switch.
MEDIUM
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q (II)
Draw the standard symbol used to represent a bulb.
MEDIUM
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>LET’S ANSWER>Q (II)
Draw the standard symbol used to represent a wire.
EASY
7th Jammu and Kashmir Board
IMPORTANT
SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 14 - Electric Current and Circuits>ELECTRIC BUZZER
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?
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.