Advertisements
Advertisements
प्रश्न
Which one of the following statements about power stations is not true?
पर्याय
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
उत्तर
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
संबंधित प्रश्न
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.
An electric heater is rated 1500 W. How much energy does it use in 10 hours?
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)
Name the physical quantity whose unit is watt.
What is the power of a body which is doing work at the rate of one joule per second?
A man weighing 500 N carried a load of 100 N up a flight of stairs 4 m high in 5 seconds. What is the power?
A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 m/s2)
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)
