Advertisements
Advertisements
Question
Name the physical quantity whose unit is watt.
Advertisements
Solution
Power is the physical quantity whose SI unit is watt. Power is defined as rate of doing work.
APPEARS IN
RELATED QUESTIONS
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
Define average power.
What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer.
How much is the mass of a man if he has to do 2500 joules of work in climbing a tree 5 m tall? (g = 10 m s−2)
What is the power of a body which is doing work at the rate of one joule per second?
Fill in the blanks with suitable words :
One watt is a rate of working of one ___________ per ___________.
A trolley is pushed along a road with a force of 400 N through a distance of 60 m in 1 minute. Calculate the power developed.
An electric heater uses 600 kJ of electrical energy in 5 minutes. Calculate its power rating.
Define power. Give the SI unit of power.
In an experiment to measure his power, a student records the time taken by him in running up a flight of steps on a staircase. Use the following data to calculate the power of the student :
Number of steps = 28
Height of each step = 20 cm
Time taken = 5.4 s
Mass of student = 55 kg
Acceleration = 9.8 m s−2
due to gravity
