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Physics 9 Chapter 6 - Work and Energy - 21
1.
When sunlight falls on a solar cell, into which energy light energy is converted?
a) Electrical energy
b) Sound energy
c) Mechanical energy
d) Chemical energy
2.
Which of the following converts light energy into electrical energy?
a) Electric generator
b) Electric bulb
c) Photo cells
d) Electric cell
3.
Solar cells are used to power..............?
a) Satellites
b) Scientific research centres
c) Light houses
d) All of these
4.
In the United States, some wind farms generate more than .....................of electricity a day?
a) 1300 GW
b) 1300 kW
c) 1300 NW
d) 1300 MW
5.
Which energy is used by windmills to grind grain?
a) Solar energy
b) Wind energy
c) Geothermal energy
d) Thermal energy
6.
Which energy is used by windmills to pump water?
a) Solar energy
b) Geothermal energy
c) Thermal energy
d) Wind energy
7.
Which energy is used to turn wind turbines?
a) Solar energy
b) Thermal energy
c) Wind energy
d) Geothermal energy
8.
Where wind farms generate more than 1300 MW of electricity a day?
a) In Pakistan
b) In United States
c) In Europe
d) In Turkey
9.
Water reaching close to the magma changes to steam due to the high temperature of magma. What is energy thus produced called?
a) Solar energy
b) Wind energy
c) Thermal energy
d) Geothermal energy
10.
What is the hot molten part, deep in the Earth called?
a) Biomass
b) Magma
c) Salinity
d) Lava
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