Advertisements
Advertisements
प्रश्न
An electric motor of power 100 W is used to drive the stirrer in a water bath. If 50% of the energy supplied to the motor is spent in stirring the water. Calculate the work done on the water in one minute.
Advertisements
उत्तर
An Electric motor :
Power (P) = 100 watt.
Time (t) = 1 minute = 60 seconds
∴ Work done by motor = Produced energy
= P × t
= 100 × 60
= 6000 Joule
∴ Work done on water by motor = 50% of total produced energy
`=50/100xx6000`
= 3000 Joule.
संबंधित प्रश्न
Name a common device where a gear train is used
An electron emitter must have _____________ work function and ___________ melting point.
State two factors on which the work done on a body depends.
A vessel containing 50 kg of water is placed at a height 15 m above the ground. Assuming the gravitational potential energy at ground to be zero, what will be the gravitational potential energy of water in the vessel? (g = 10 m s-2)
What is meant by a translational motion? Give one example.
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
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.
