EASY
7th CBSE
IMPORTANT
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Identify the following symbol. Also mark the positive and negative terminals in the symbol for the cell.
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Important Questions on Electricity

EASY
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q B
Identify the following symbol. Also mark the positive and negative terminals in the symbol for the cell.
EASY
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q B
Identify the following symbol. Also mark the positive and negative terminals in the symbol if it is a cell.
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MEDIUM
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q B
How is the heat produced by an electric current related to resistance and the magnitude of the current?
MEDIUM
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q B
Why is a long and thin tungsten filament used in a bulb?
MEDIUM
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q B
Mention two problems associated with the heating effect of electric current.
MEDIUM
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q B
What is an electromagnet? Mention two properties of an electromagnet.
HARD
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q C
What is electrical resistance? On what does the resistance of a piece of material depend? How does resistance affect current?
MEDIUM
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q C
What is a fuse? How does it work?