EASY
7th CBSE
IMPORTANT
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The strength of a magnetic field due to a solenoid can be increased by

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Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q A
Which of these appliances does not use an electromagnet?
 
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q A
Which of these is absolutely necessary in an electric circuit?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q A
The same current is passed through the following. Which will show the strongest magnetic strength?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q B

Which insulator does a switch use to cut off the current in a circuit?

(Choose from the following: Copper wire/ Air/ Plastic/ Glass)

EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q B
Metals are conductors of electricity.
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q B
Every conductor offers some resistance to the flow of electric current. 
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q B
We use symbols to draw a circuit _____.
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q B
 A point A in a circuit is at a lower potential than point B. In Which direction will the current flow in the circuit?