Question 1.
In a magnetic field, the direction of motion of a current carrying conductor is given by
A. Maxwell’s right hand rule
B. Lenz’s rule
C. Flemings left hand rule
D. Kirchoff’s law
Ans: C. Flemings left hand rule
Question 2.
At the center of the sun, fusion converts hydrogen into
A. Helium
B. Plutonium
C. Water
D. Carbon
Ans: A. Helium
Question 3.
Choose the most appropriate answer: Natural radioactivity was discovered by
A. Marie Curie
B. Earnest Rutherford
C. Henry Bacquerel
D. Enrico Fermi
Ans: C. Henry Bacquerel
Question 4.
Radioactive elements can be traced out in living cell through a technique called
A. Centrifugation
B. Chromatography
C. Auto radiography
D. All the above
Ans: C. Auto radiography
Question 5.
The force between charged particles is called as:
A. Nuclear Force
B. Gravitational Force
C. Centrifugal Force
D. Electromagnetic Force
Ans: D. Electromagnetic Force
Question 6.
Gamma rays have greatest similarity with
A. A-rays
B. B-rays
C. X-rays
D. U.V.-rays
Ans: C. X-rays
Question 7.
In a nuclear reactor, one of the following is used as a fuel.
A. Coal
B. Uranium
C. Radium
D. Diesel
Ans: B. Uranium
Question 8.
The radiant energy having lowest energy is
A. Gamma rays
B. UV rays
C. Visible light
D. Microwave radiation
Ans: D. Microwave radiation
Question 9.
Moving electric charge produces :
A. Magnetic field
B. Sound waves
C. Light rays
D. Heat waves
Ans: A. Magnetic field
Question 10.
Heavy water is used in nuclear reactor to
A. Slow down neutron
B. Absorb neutron
C. Increase temperature
D. Increase speed of neutron
Ans: A. Slow down neutron
Question 11.
Alpha particle is the nucleus of an atom of
A. Lithium
B. Hydrogen
C. Helium
D. Oxygen
Ans: C. Helium
Question 12.
The mercury and sodium street lamps light up because of :
A. Atomic emission
B. Atomic absorption
C. Electron emission
D. Electron absorption
Ans: A. Atomic emission
Question 13.
Nuclear sizes are expressed in a unit named
A. Fermi
B. Angstrom
C. Newton
D. Tesla
Ans: A. Fermi
Question 14.
Radiocarbon is produced in the atmosphere as a result of
A. Collision between fast neutrons and nitrogen nuclei present in the atmosphere
B. Action of ultraviolet light from the sun on atmospheric oxygen
C. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D. Lightning discharge in atmosphere
Ans: A. Collision between fast neutrons and nitrogen nuclei present in the atmosphere
Question 15.
Energy stored in the nucleus of an atom is called
A. Nuclear energy
B. Atomic energy
C. Potential energy
D. Kinetic energy
Ans: A. Nuclear energy
Question 16.
Nuclear Reactors are based on which of the following phenomenon?
A. Magnetic confinement of Plasma
B. Nuclear Fusion
C. Controlled Nuclear Fission
D. None of the above
Ans: C. Controlled Nuclear Fission
Question 17.
Beta rays emitted by a radioactive material are
A. The electrons orbiting around the nucleus
B. Charged particles emitted by nucleus
C. Neutral particles
D. Electromagnetic radiations
Ans: B. Charged particles emitted by nucleus
Question 18.
What are the particles emitted by radioactive element after 3 consecutive disintegration?
A. 2 alpha 1 beta
B. 1 alpha 1 beta
C. 2 beta 1 alpha
D. 2 beta 2 alpha
Ans: C. 2 beta 1 alpha
Question 19.
In nuclear reactor, heavy water is used as
A. Coolant
B. Fuel
C. Moderator
D. Atomic smasher
Ans: C. Moderator
Question 20.
Which type of radiation has the lowest penetrating ability?
A. Alpha
B. Beta
C. Gamma
D. All of the above
Ans: A. Alpha
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
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