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7th CBSE
IMPORTANT
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A fuse wire is a wire of—

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Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 3
We are more likely to observe a strong magnetic effect with a—
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7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 4
A common household device, that uses an electromagnet in its working, is—
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7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 5
A good electromagnet would—
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7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 1

The bulb in the circuit shown in figure does not glow. Why? Redraw the circuit diagram by making the necessary changes in it, so that the bulb starts glowing. 

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EASY
7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 2
Name three practical devices based on the heating effect of current.
EASY
7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 3
Write two special characteristics of the wire needed for making the 'element' of an electric heater. 
EASY
7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 4
Give the meaning of the terms 'short-circuiting' and 'overloading' in an electric circuit. 
EASY
7th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 17 - Electric Current and Its Effects>Something To Know>Q 5
Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.