MEDIUM
7th CBSE
IMPORTANT
Earn 100

Describe briefly the working of magnetic cranes.

Important Questions on Electricity and Magnetism

MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Chapter Review>Q 5
Describe briefly the working of a fuse.
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Chapter Review>Q 5
Describe briefly the working of MCB.
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Chapter Review>Q 6
On what factors do the strength of an electromagnet depend and how?
HARD
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Chapter Review>Q 7
With the help of a diagram, show the working of an electric bell.
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Time to Think>Q 1
Can we use a bar magnet in an electric bell instead of an electromagnet? Explain.
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Time to Think>Q 2
You must have watched birds sitting on the naked high tension wire. Why do they not get electric shock? 
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Time to Think>Q 3
What is a short-circuit? How does it lead to a fire accident? 
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 14 - Electricity and Magnetism>Time to Think>Q 4
Nowadays, battery operated doorbells are quite popular. Can you guess the reason behind their popularity?