English

Define Power. - Physics

Advertisements
Advertisements

Questions

Define power.

Define the following:

Power

Definition

Solution

Power is defined as the rate of doing work or work done per second.

i.e., Power = `("Work done in joule")/("Times in second")`

or,  p = `("W (in joule)")/("t (in second)")`

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Force, Work, Power and Energy - Short Answers

APPEARS IN

ICSE Physics [English] Class 10
Chapter 1 Force, Work, Power and Energy
Short Answers | Q 49.1
Samacheer Kalvi Physics - Volume 1 and 2 [English] Class 11 TN Board
Chapter 4 Work, Energy and Power
Evaluation | Q II. 5. b) | Page 205
Selina Physics [English] Class 10 ICSE
Chapter 2 Work, Energy and Power
Exercise 2 (A)c1 | Q 23.1 | Page 28

RELATED QUESTIONS

A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to ______.


The S.I. unit of power is ..........


1 H.P. = .........


Two coolies A and B do some work in time 1 minute and 2 minute respectively. The power spent is


It takes 20 s for a girl A to climb up the stairs while girl B takes 15 s for the same job. Compare the power spent by then.


Differentiate between watt and watt hour.


An electric pump has 2 kW power. How much water will the pump lift every minute to a height of 10 m?


If a 1200 W electric iron is used daily for 30 minutes, how much total electricity is consumed in the month of April?


What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?.


A wind-powered generator converts wind energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to ______


Arrive at an expression for power and velocity. Give some examples for the same.


A quarter horse power motor runs at a speed of 600 r.p.m. Assuming 40% efficiency, the work done by the motor in one rotation will be


Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g = 10m/s2)


A man is throwing bricks of mass 2 kg onto a floor from a height of 2 m. Bricks reach the floor at a speed `2sqrt(10)` m/s. Man throws 10 bricks in a minute. If the power of man is W watt then `3/10` W is equal to ______ W.


Sand is being dropped from a stationary dropper at a rate of 0.5 kgs-1 on a conveyor belt moving with a velocity of 5 ms-1. The power needed to keep belt moving with the same velocity will be ______.


Unit of power used in mechanical engineering is ______.


Name the quantity which is measured in Wh.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×