EASY
7th CBSE
IMPORTANT
Earn 100

Name the scientist who invented the electric bulb used for lighting purpose.

Important Questions on Electric Current and Its Uses

EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 3
What do you understand by a ‘filament’ being used in bulb.
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 4
Why do we create vacuum inside an electric bulb?
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 5
In some cases a gas is filled in an electric bulb. Which kind of gas is filled in a bulb and why
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 6
What are fluorescent tubes? What is their advantage over an ordinary bulb.
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 7
What do you understand by CFL’s?
EASY
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 1
Name the scientist who first discovered the magnetic effect of electric current.
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 2
Describe in brief the way in which he discovered the magnetic effect of electricity
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 13 - Electric Current and Its Uses>Test Your Learning Outcome>Q 3
You are given a soft iron nail, some insulated wires and an electric cell. Show diagrammatically the way in which you can make your own electromagnet.