SAT Physics - Sources of Energy
Exam Duration: 45 Mins Total Questions : 30
Liquified petroleum gas mainly contains
- (a)
Methane
- (b)
Butane
- (c)
Propane
- (d)
Ethene
What is the normal power rating of a compact fluorescent lamp (CFL)?
- (a)
25 Watt
- (b)
15 Watt
- (c)
40 Watt
- (d)
50 Watt
The calorific values of three fuels x,y and z are 17 KJ/g, 48 KJ/g and 150 KJ/g respectively. At room temperature x is a solid, y is a liquid and z is a gas. On combustion z explodes forming stream whereas x and y produces CO2 and leave no residue. The most ideal fuel out of these three is
- (a)
fuel x
- (b)
fuel z
- (c)
fuel y
- (d)
y & z
A Uranium reactor consumes 100 g of 1\(\times\) enriched Ur in one hour. Assuming that each fission from U235 releases 3.2 \(\times\) 1011 J of energy and 238 g of Ur contains 6 \(\times\)1023atoms. The power generated by the reactor
- (a)
2.24\(\times\)107W
- (b)
8.06\(\times\)1010 W
- (c)
2.52\(\times\)109W
- (d)
6.0\(\times\)1010W
With the addition of impurities, the resistance of a semi-conductor
- (a)
increases
- (b)
decreases
- (c)
first decreases then increases
- (d)
first increases then decreases
Upper atmosphere receives energy from Sun at the rate of
- (a)
1.36 KJ per square metre per second
- (b)
3.61 KJ per square metre per second
- (c)
1.63 KJ per square metre per second
- (d)
6.31 KJ per square metre per second
The energy available due to difference in the temperature of water at the surface of ocean and at deeper levels is called
- (a)
Tidal energy
- (b)
Wind energy
- (c)
Solar energy
- (d)
None of these
Energy is available from the ocean as
- (a)
OTE
- (b)
Tidal energy
- (c)
Sea-wavy energy
- (d)
all the above
Earth-surface absorbs only ________ heat that reaches the atmosphere
- (a)
53%
- (b)
66%
- (c)
47%
- (d)
70%
Most of the fuels are
- (a)
carbon compounds with sulphur
- (b)
nitrogen compounds with carbon
- (c)
carbon compounds with hydrogen
- (d)
none of these
Which of the following is not a bio-mass source?
- (a)
Gobar gas
- (b)
Coal
- (c)
Wood
- (d)
Nuclear energy
The radiations emitted by the sun and responsible for the cause of skin cancer are ____
- (a)
Infra-red
- (b)
X-rays
- (c)
Micro-waves
- (d)
Ultra-violet
The lid of the solar cooker is made up of ______
- (a)
Plastic sheet
- (b)
Black sheet
- (c)
Plane mirror
- (d)
Glas
The fuel used in the nuclear reactor is _______
- (a)
Cadmium
- (b)
Radium
- (c)
Uranium
- (d)
Thorium
In a hydro power plant:
- (a)
Potential energy possessed by stored water is converted into electricity
- (b)
Kinetic energy possessed by stored water is converted into potential energy
- (c)
Electricity is extracted from water
- (d)
Water is converted into steam to produce electricity
Which of the following is a non-renewable source of energy?
- (a)
Wood
- (b)
Sun
- (c)
Fossil fuels
- (d)
Wind
The source of energy of the sun is ____
- (a)
Nuclear fission
- (b)
Chemical reaction
- (c)
Nuclear fusion
- (d)
Photoelectric effect
India exploded her first underground nuclear device at _______
- (a)
Kota
- (b)
Ranchi
- (c)
Jaipur
- (d)
Pokhran
The major problem in harnessing nuclear energy is how to
- (a)
Split nuclei
- (b)
Sustain the reaction.
- (c)
Dispose- off spent fuel safely.
- (d)
Convert nuclear energy into electrical energy.
Fuel used in thermal power plants is:
- (a)
Water
- (b)
Uranium
- (c)
Biomass
- (d)
Fossil fuels
The renewable source of energy is.
- (a)
Coal
- (b)
Petroleum
- (c)
Natural gas
- (d)
Wind
To produce biogas in a biogas plant we need
- (a)
air but not water
- (b)
water but not air
- (c)
air and water
- (d)
neither air nor water
The energy of the stars is produced by
- (a)
Chemical reaction
- (b)
Thermonuclear reactions
- (c)
Nuclear fission
- (d)
Gravitational condensation.
The gas mainly responsible for producing green house effect is
- (a)
Carbon dioxide
- (b)
Nitrogen dioxide
- (c)
Oxygen
- (d)
Methane
A large concave reflector is used as
- (a)
Solar water heater
- (b)
Solar concentrator
- (c)
Solar panel
- (d)
Solar cooker
The best quality of coal is
- (a)
Bituminous
- (b)
Anthracite
- (c)
Lignite
- (d)
Peat
Fusion reaction is initiated with the help of
- (a)
Neutrons
- (b)
Neutrons
- (c)
Neutrons
- (d)
Any Particle
The maximum temperature attained by a box type solar cooker is
- (a)
20°C
- (b)
50°C
- (c)
150°C
- (d)
100°C
In nuclear fusion process
- (a)
A big nucleus splits
- (b)
Smaller nuclei fuse to form larger nuclei
- (c)
The nucleus may split or fuse
- (d)
None of these
Energy consumption is increasing due to
- (a)
Setting up new industries
- (b)
Growth of cities
- (c)
Modern machinery
- (d)
All of these
