MEDIUM
7th CBSE
IMPORTANT
Earn 100

How is the heat produced by an electric current related to resistance and the magnitude of the current?

Important Questions on Electricity

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?
HARD
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q C
Explain with the help of a diagram the construction and working of an electric bell.
EASY
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q D
The greater the _____ across a device, the greater is the current through it. (Choose from: Voltage/ EMF/ Resistance)
EASY
7th CBSE
IMPORTANT
Basic Science For Class 7>Chapter 7 - Electricity>Exercises>Q D
The connections between components are represented by _____ (Straight lines/circles) in a circuit diagram.