Advertisements
Advertisements
Question
Which one of the following statements about power stations is not true?
Options
hydroelectric power stations use water to drive turbines
in a power station, turbines drive generators
electricity from thermal power stations differs from that produced in hydroelectric power stations
in hydroelectric power stations and thermal power stations, alternators produce electricity
Advertisements
Solution
Electricity produced in a hydroelectric power station is similar to electricity produced in thermal power plants.
Therefore, the answer is, (c) The electricity from a thermal power station differs from that produced in a hydroelectric power station.
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.
A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.
Define kilowatt-hour.
A body does 1200 joules of work in 2 minutes. Calculate its power.
Fill in the blanks with suitable words :
One watt is a rate of working of one ___________ per ___________.
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
In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.
If the man lifts 4 boxes per minute, at what power is he working?
(g = 10 m s−2)
