Advertisements
Advertisements
प्रश्न
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
Advertisements
उत्तर
Electrical energy (electric current) → light energy + Heat energy (bulb).
APPEARS IN
संबंधित प्रश्न
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
What are the two kinds of mechanical energy?
1 J = ______ calorie.
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
Fill in the boxe to show the corresponding energy transformation.
How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?
What is work?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Food grains are getting dried in the sun.
