Work And Energy Chapter 6 Physics 9th Class MCQ Test Preparation Federal

Total Questions: 10

Total Marks: 10

Time: 10 Mins

Question # 1

An atomic power station has a capacity of generating power of 180 MW. What is the energy generated by it in a day?

Question # 2

Which of the following options is equivalent to SI unit of power (watt)?

Question # 3

134 W
50 W
220 W
98 W

Question # 4

Which of the following is the common energy source in the villages of Pakistan?

Electricity
Sun
Wood and animal dung
Coal

In many villages of Pakistan, cheap and affordable means of energy sources are used.

Question # 5

What is the cause of ocean thermal energy?

Energy stored by waves in ocean
Pressure difference at different levels in ocean
Temperature difference at different levels in ocean
Tides rising up in ocean

Ocean thermal energy conversion plants pump large quantities of deep cold seawater and surface seawater to run a power cycle and produce electricity.

Question # 6

A small emergency generator supplies 256,000,000 J of electrical energy in 24 hours. What is the average power output of the generator?

52,000,000 W
2,963,000 W
2963 W
256,000,000 W

Question # 7

Which of the following statements is common for all fossil fuels?

Fossil fuels contain carbon
Fossils have undergone the same set of geological processes during their formation.
Fossils represent the remains of one living organisms
Fossils were originally formed in marine environment

A fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.

Question # 8

Hydroelectric, tidal and fossil fuel power stations generate electrical energy. Do these use renewable sources of energy?

(Hydroelectric : no)(tidal : yes)(Fossil fuel : yes)
(Hydroelectric : yes)(tidal : no)(Fossil fuel : no)
(Hydroelectric : no)(tidal : no)(Fossil fuel : yes)
(Hydroelectric : yes)(tidal : yes)(Fossil fuel : no)

A renewable resource is a natural resource which replenishes to overcome resource consumption, either through biological reproduction or other naturally recurring processes in a finite amount of time,

Question # 9

An electric motor provides a power of 20 kW to an elevator of mass 1200 kg in a building. Find the minimum time required by the elevator to rise from the ground to 40m above to the top. The value of g is 9.8 m s − 2 .

49.53 s
19.56 s
9.56 s
23.52 s

Question # 10

The image shows parts of a power station. Energy changes are taking place during the process. Which energies are mentioned as A and B in the energy flow diagram?