Home
Class 9
PHYSICS
What is power?...

What is power?

Text Solution

Verified by Experts

Power is defined as the rate of doing work or the rate of transfer of energy.
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    KUMAR PRAKASHAN|Exercise QUESTION & ANSWER (ANSWER THE FOLLOWING QUESTIONS IN VERY SHORT)|34 Videos

  • WORK AND ENERGY

    KUMAR PRAKASHAN|Exercise QUESTION & ANSWER (CHOOSE THE CORRECT OPTION FROM THOSE GIVEN BELOW EACH QUESTION)|66 Videos

  • WORK AND ENERGY

    KUMAR PRAKASHAN|Exercise ACTIVITY 11.13|10 Videos

  • SOUND

    KUMAR PRAKASHAN|Exercise QUESTIONS AND ANSWERS (Additional numericals for practice)|16 Videos

Similar Questions

Explore conceptually related problems

Two electric bulbs are connected one by one across potential difference V At that time power consumed in them are P_1 and P_2 respectively. Now, if potential difference V is applied across series combination of these bulbs, what will be total power consumed ?

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

A lamp consumes 1000 J of electrical energy in 10s. What is its power?

(a) The power of sound from the speaker of a radio is 20 mW. By turning the knob of volume control the power of sound is increased to 400 mW, What is the power increase in dB as compared to original power? (b) How much more intense is an 80 dB sound than a 20 dB whisper?

What power is gained by a man when he eats 100 g ice in one minute ? Latent heat of fusion of ice is 80 cal/gm.

What is the power of a lens that can be used to correct the eye defect of a person who cannot see the objects distinctly kept beyond 2 m ?

Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.

An engine pumps water through a hose pipe water passes through the pipe and leaves it with velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m .What is the power of the engine ?

A far sighted person has a near point of 60"cm" . What power lens should be used for eye glasses such that the person can be read this book at a distance of 25 cm.