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Quiz 14
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Q.1
Energy stored in the nucleus of an atom is called
Nuclear energy
Atomic energy
Potential energy
Kinetic energy
Q.2
Heavy water is used in nuclear reactor to
Slow down neutron
Absorb neutron
Increase temperature
Increase speed of neutron
Q.3
Radiocarbon is produced in the atmosphere as a result of
Collision between fast neutrons and nitrogen nuclei present in the atmosphere
Action of ultraviolet light from the sun on atmospheric oxygen
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
Lightning discharge in atmosphere
Q.4
The force between charged particles is called as:
Nuclear Force
Gravitational Force
Centrifugal Force
Electromagnetic Force
Q.5
Moving electric charge produces :
Magnetic field
Sound waves
Light rays
Heat waves
Q.6
Tape recorder should not be kept near one of the following things :
Clock
Magnet
Electrical switchboard
Radio
Q.7
Low voltage cables are meant for use up to
3.3 kV
1.1 kV
11 kV
0.5 kV
Q.8
The method of magnetisation is:
Hammering a magnet
Heating a magnet
Passing direct current through it
Passing alternating current through it
Q.9
The paramagnetic theory of magnetism applies to
Nickel
Mercury
Iron
Platinum
Q.10
Where should a boat compass be mounted?
Near magnet
Near iron
Away from electrical wiring
All the above
Q.11
Which of the following group of elements are diamagnetic?
Argon, copper, silver
Hydrogen, argon, copper
Oxygen, copper, silver
Hydrogen, oxygen, Argon
Q.12
Which of the following is not true about X-rays?
Have low penetrating power
Travel with the speed of light
Can be reflected or refracted
Can affect photographic plates
Q.13
A multimeter is used to measure
Current
Voltage
Resistance
All of the above
Q.14
In nuclear reactor, heavy water is used as
Coolant
Fuel
Moderator
Atomic smasher
Q.15
What are the particles emitted by radioactive element after 3 consecutive disintegration?
2 alpha 1 beta
1 alpha 1 beta
2 beta 1 alpha
2 beta 2 alpha
Q.16
Nuclear sizes are expressed in a unit named
Fermi
Angstrom
Newton
Tesla
Q.17
Which one among the following is not an electromagnetic wave?
X-Ray
R-Ray
Cathode Ray
Infrared Ray
Q.18
Eddy current is generated by
Conduction
Induction
Convection
Direct Current
Q.19
Which of the following circuit elements is used to ''block" DC in an electronic circuit ?
Resistances
Capacitance
Inductance
Diode
Q.20
Magnetic keepers are pieces of
Nickel
Cobalt
Steel
Soft iron
Q.21
Curie point is the temperature at which
Matter becomes radioactive
A metal loses magnetic properties.
A metal loses conductivity
Transmutation of metal occurs.
Q.22
Which of the following properties is found only in ferromagnetic materials ?
Susceptibility independent of temperature
Point in a particular direction
Hysteresis
Attracting a magnetic substance
Q.23
At the Curie temperature, the ferromagnetic materials get converted into
Diamagnetic materials
Non-magnetic materials
Paramagnetic materials
None of the others
Q.24
In the process of magnetisation of a bar
The entire bulk of the bar gets magnetised
Only the surface of the bar gets magnetised
Only the ends of the bar get magnetised
Only some parts of the outer layers of the bar get magnetised
Q.25
X–rays are
Positively charged particles
Negatively charged particles
Neutral particles
None of these
Q.26
Which one type of radiation has the longest wave length
Infrared
Ultraviolet
X-ray
Radio Wave
Q.27
Beta rays emitted by a radioactive material are
The electrons orbiting around the nucleus
Charged particles emitted by nucleus
Neutral particles
Electromagnetic radiations
Q.28
A car parked in the sun with its windows closed gets terribly hot inside. This is due to
The heat emitted by the engine
The greenhouse effect
The good conducting power of the metal body
The double layered wind shield
Q.29
What is the wavelength of visible spectrum ?
1300 A°–3000 A°
3900 A° – 7600 A°
7800 A° – 8000 A°
8500 A° – 9800 A°
Q.30
Gamma rays can cause
Gene mutation
Sneezing
Burning
Fever
Q.31
Electromagnetic waves are transverse in nature is evident by
Reflection
Polarisation
Interference
Diffraction
Q.32
Which of the following parts of the sunlight makes the solar cooker hot ?
Ultra violet
Red light
Infra red
Cosmic rays
Q.33
A photostat machine works on
Electromagnetic image making
Electrostatic image making
Magnetic image making
Thermal image making
Q.34
On which of the following techniques photostate machine works ?
Magnetic Image—Making
Thermal Image—Making
Electrostatic Image—Making
Electromagnetic Image— Making
Q.35
Tesla is a unit of magnetic :
Flux
Induction
Moment
Field
Q.36
Magnetic field lines about a current-carrying wire
Circle the wire in closed loops
Extend radially from the wire
Both of these
None of the above
Q.37
Magnetic domains normally occur in
Copper
Silver
Iron
All of the above
Q.38
A small piece of a substance is weakly attracted by a strong magnetic field. The substance is
Diamagnetic
Ferromagnetic
Paramagnetic
Non-magnetic
Q.39
X-rays region lies between
Ultraviolet and visible region
Visible and infra-red region
Gamma-rays and ultraviolet region
Short radio waves and long radio waves
Q.40
In the absence of ozone layer, which rays will enter into atmosphere?
Infrared
Visible
Ultraviolet
X-rays
Q.41
Forged documents are detected by
Ultraviolet rays
Infra-red rays
Beta rays
Gamma rays
Q.42
To measure the speed of an approaching car a police officer shines
Light waves on it
Microwaves on it
Radio waves on it
Ultra high frequency waves on it
Q.43
Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ?
Ionosphere
Stratosphere
Mesosphere
Exosphere
Q.44
Where are mesons found ?
Cosmic rays
X-rays
Gamma rays
Laser beam
Q.45
Green house effect is the heating up of the Earth's atmosphere which is due to
The ultraviolet rays
G-rays
The infra-red rays
X-rays
Q.46
Visible light has a higher frequency than
Radio waves
X rays
Ultra violet
All the above
Q.47
Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by
Carbon dioxide
Ammonia
Chlorine
Ozone
Q.48
In the atmosphere ultraviolet rays are absorbed by
Oxygen
Nitrogen
Ozone
Helium
Q.49
In MRI machine, which one of the following is used?
Sound wave
X-ray
Ultra-sound wave
Magnetic wave
Q.50
The radiation initially produced in fluorescent tube is
Infrared
Ultraviolet
Microwaves
X-rays
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