How many joules make $1 \mathrm{kWh}$ ?

Important Questions on Work and Energy

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 28

In an oscillating pendulum, at what positions are the potential and kinetic energy maximum.

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 29

Name the term used for the sum of kinetic and potential energy of a body.

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 30

Write the observed energy transformation that takes place at a thermal power station.

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 31

If the heat works $60 \mathrm{joules}$ in one minute. What is its power?

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 32

State the value of the commercial unit of electric energy in joule.

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 33

At what rate is electric energy consumed in a $60 \mathrm{W}$ bulb?

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 34

Give an example of a body having potential energy due to change in shape?

EASY

9th CBSE

IMPORTANT

Modern's abc+ Of Science - Physics For Class IX>Chapter 5 - Work and Energy>Summative Assessment>Q 35

If the speed of the body is halved, what is the change in kinetic energy?