EASY
9th CBSE
IMPORTANT
Earn 100

Define the term ‘Watt’.

Important Questions on Work and Energy

EASY
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 8
What is the power of a body which is doing work at the rate of one joule per second?
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 9
How many joules are there in one kilowatt hour (1 kW h)?
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 1
How is energy stored in a clock?
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 2

Name the energy transformation that occurs in a loudspeaker. 

MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 2
Name the energy transformation that occurs in a solar cell.
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 2
Name the energy transformation that occurs in a torch battery.
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 2
Name the energy transformation that occurs in a microphone.
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 4 - Work and Energy>Exercise>Q 3
State the energy changes which occur in the following.
Burning of coal.