Advertisements
Advertisements
प्रश्न
If an electric bulb of 100 watt is lighted for 2 hours, how much electric energy would be consumed?
Advertisements
उत्तर
Given power= 100 watt, time = 2hrs
Energy consumed = power x time
= 100 x 2 x 60 x 60
= 7.2 x 105 J
APPEARS IN
संबंधित प्रश्न
Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.
Can every force produce work?
A body does 20 J of work in 10 s. What is its power?
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
If a ball is dropped on the sloping roof of a house, it acquires ______ and falls on the ground. That is the transformation of ______ energy into ______ energy takes place.
(kinetic, potential, motion)
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.
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
A force of F = (5y + 20) `hat"j"` N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ______ J.
