Give two examples each of conductors and insulators. 

Important Questions on Electric Current and its Effect

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Answer these>Q 1

From which alloy are the heating elements of electric heater and electric press made of?

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Answer these>Q 2

What is the safety device used in an electric circuit called? 

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Answer these>Q 3

Why is the fuse wire made of a material which has Low melting point?

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Answer these>Q 4

Write two uses of the electromagnet. 

EASY

7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Questions for practice>Q 1

 The materials which allow electric current to pass through them are called

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Questions for practice>Q 1

Which of the following is not a good conductor of electricity?

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Questions for practice>Q 1

Filament of electric bulb is made up of-
 

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7th Chhattisgarh Board

IMPORTANT

Science & Technology Class - VII>Chapter 21 - Electric Current and its Effect>Questions for practice>Q 1

Electric heater shows following effect of electric current -