NTSE 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
A country has a potential to produce 600 \(\times\) 108 MW of hydroelectric power and is utilizing 20% of this capacity. 30% of the total electricity generation in this country is from hydroelectric power plants. The total electrical power produced by it is
- (a)
4 \(\times\) 108MW
- (b)
120 \(\times\) 106MW
- (c)
4 \(\times\) 106MW
- (d)
120 \(\times\) 108MW
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
To work properly, wind electric generators need wind speeds of atleast about
- (a)
1.5 km/hr
- (b)
15 km/hr
- (c)
150 km/hr
- (d)
1500 krn/hr
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
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
Who conducted the first controlled fission reaction?
- (a)
Fermi
- (b)
Cavendish
- (c)
Otto Hahu
- (d)
Hans Bethe
Which of the following type of radiations is used in heating of a Solar cooker
- (a)
Visible light
- (b)
Infra-red rays
- (c)
UV rays
- (d)
None of these
Most of the fuels are
- (a)
carbon compounds with sulphur
- (b)
nitrogen compounds with carbon
- (c)
carbon compounds with hydrogen
- (d)
none of these
The nuclear fuel in Sun is
- (a)
Uranium
- (b)
Hydrogen
- (c)
Helium
- (d)
Thorium
Which of the following fuel is different from others?
- (a)
Diesel
- (b)
Lignite
- (c)
Gasoline
- (d)
Alcohol
The main constituent of LPG is ______
- (a)
Methane
- (b)
Butane
- (c)
Hydrogen
- (d)
Propane
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 efficiency of the solar cooker can be increased by placing a___
- (a)
Plane mirror
- (b)
Convex mirror
- (c)
Convex lens
- (d)
Concave lens
The molten material mixed with gases in the mantle of the earth is called ______
- (a)
Core
- (b)
Lava
- (c)
Geyser
- (d)
Magma
The fuel used in the nuclear reactor is _______
- (a)
Cadmium
- (b)
Radium
- (c)
Uranium
- (d)
Thorium
Ocean thermal energy is due to
- (a)
Energy stored by waves in the ocean
- (b)
Temperature difference at different levels in the ocean
- (c)
Pressure difference at different levels in the ocean
- (d)
Tides arising out in the ocean
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.
The renewable source of energy is.
- (a)
Coal
- (b)
Petroleum
- (c)
Natural gas
- (d)
Wind
When we use biomass to generate electricity the conversion of energy is from
- (a)
Chemical to electrical energy
- (b)
Kinetic to electrical energy
- (c)
nuclear energy to electrical
- (d)
muscular energy to electrical energy
The part of sunlight used in heating solar cooker is
- (a)
Ultraviolet rays
- (b)
Infrared radiations
- (c)
Visible radiations
- (d)
All of these
A wind mill can function with a minimum wind velocity of abo
- (a)
10 km/hr
- (b)
7km/hr
- (c)
15 km/hr
- (d)
20km/hr
The energy processed by water stored in the dam i
- (a)
heat energy
- (b)
kinetic energy
- (c)
chemical energy
- (d)
potential energy
Simplest hydrocarbon is
- (a)
methane
- (b)
hydrogen
- (c)
ammonia
- (d)
oxygen
Cooking gas is
- (a)
CNG
- (b)
LPG
- (c)
Natural
- (d)
Petroleum gas
The maximum temperature attained by a box type solar cooker is
- (a)
20°C
- (b)
50°C
- (c)
150°C
- (d)
100°C
Methane forms an explosive mixture with
- (a)
Methane
- (b)
Air
- (c)
Butane
- (d)
None of these
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
