Question 1.
In beta decay what is emitted?
A. Electron
B. Proton
C. Neutron
D. All of the above
Ans: A. Electron
Question 2.
The least penetrating power ray is
A. Gamma rays
B. Beta rays
C. Alpha rays
D. None of the above
Ans: C. Alpha rays
Question 3.
After removing two electrons from helium atom it become?
A. UV rays
B. Alpha particle
C. Gama particle
D. X rays
Ans: B. Alpha particle
Question 4.
Which, of the following radiations has the least wavelength ?
A. X-rays
B. A-rays
C. G-rays
D. B-rays
Ans: C. G-rays
Question 5.
Which one of the following ray has minimum wavelength?
A. Gamma ray
B. Cosmic ray
C. Utraviolet ray
D. X-rays
Ans: A. Gamma ray
Question 6.
Gamma rays are emissions that have
A. Charge but no mass
B. Neither mass nor charge
C. Both mass and charge
D. Mass but no charge
Ans: B. Neither mass nor charge
Question 7.
Atomic packing factor of body centred cubic structure (bcc) is
A. 0.63
B. 0.68
C. 0.69
D. 0.73
Ans: B. 0.68
Question 8.
For Gamma radiation, what stops its penetrating abilities?
A. Lead
B. Steal
C. Concrete
D. All of the above
Ans: D. All of the above
Question 9
Nuclear Fission is caused by the impact of
A. Electron
B. Neutron
C. Proton
D. Deutron
Ans: B. Neutron
Question 10.
In the gamma decay of a nucleus
A. The mass number of the nucleus changes whereas its atomic number does not change
B. The mass number of the nucleus does not change whereas its atomic number changes
C. Both the mass number and the atomic number of the nucleus change
D. Neither the mass number nor the atomic number of the nucleus changes
Ans: D. Neither the mass number nor the atomic number of the nucleus changes
Question 11.
A nuclear reactor is said to have become ‘critical’ when
A. It stops due to malfunctioning
B. It starts emitting dangerous radioactive radiations
C. It is shut down to avoid explosion
D. It is ready to produce controlled energy
Ans: D. It is ready to produce controlled energy
Question 12.
An atom bomb based upon the principle of __
A. Nuclear fission
B. Nuclear fussion
C. Controlled chain reaction
D. None of these
Ans: A. Nuclear fission
Question 13.
Radiocarbon dating technique is used to estimate the age of
A. Fossils
B. Rocks
C. Monuments
D. Soil
Ans: A. Fossils
Question 14.
Who among the following developed the technology of underground nuclear explosion ?
A. Dr. Homi J. Bhabha
B. Dr. Vikram Sarabhai
C. Dr. Raja Ramanna
D. Dr. P. K. Iyengar
Ans: A. Dr. Homi J. Bhabha
Question 15.
Nuclear reactors used to produce electricity are based on
A. Nuclear fission
B. Nuclear fusion
C. Cold fusion
D. Superconductivity
Ans: A. Nuclear fission
Question 16.
The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in :
A. Rems
B. Roentgen
C. Curie
D. Rads
Ans: A. Rems
Question 17.
Which of the following branch of Physics deal with study of Atomic Nuclei?
A. Nuclear Physics
B. Bio Physics
C. Atomic Physics
D. None of the above
Ans: A. Nuclear Physics
Question 18.
A radioactive substance does not undergo any change (in mass or charge) during
A. Gamma-emission
B. Oxidation
C. Alpha-emission
D. Beta-emission
Ans: A. Gamma-emission
Question 19.
The energy obtained from atoms is known as __
A. Solar energy
B. Heat energy
C. Nuclear energy
D. Chemical energy
Ans: C. Nuclear energy
Question 20.
Radioactivity is due to
A. Unstable nucleus
B. Stable nucleus
C. Stable electronic configuration
D. Stable electronic configuration
Ans: A. Unstable nucleus
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
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- Physics MCQs Set-76
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