Advertisements
Advertisements
प्रश्न
Is power a scalar quantity?
Advertisements
उत्तर
Yes, power is a scalar quantity.
APPEARS IN
संबंधित प्रश्न
Why is a jack screw provided with a long arm?
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
Can work done be zero even if force acts on the body?
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.
