Draw the standard symbol used to represent a bulb.

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 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.

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