Free Nuclear Physics MCQs with Answers
1,254 Nuclear Physics MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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1,254 questions · page 42 of 63
- A. X-ray
- B. Beta-ray
- C. Gamma-ray
- D. Alpha-ray
Explanation: For internal imaging of braina gamma rays are used.
Correct answer: Gamma-ray- A. 1 to 10
- B. 10 to 100
- C. 10 to 1000
- D. 10 to 10000
Explanation: This is the range to which the human body can be exposed. Greater than this range can be fatal for the human body.
Correct answer: 1 to 10- A. -2/3 e
- B. -2 e
- C. -1 e
- D. -1/2 e
Explanation: One down quark has a charge of -⅓. Hence, charge for two down quarks will be,-⅓ + (-⅓) = -⅔
Correct answer: -2/3 e- A. De-excite the nucleus
- B. Excites the nucleus
- C. Scattered by nucleus
- D. No effect on nucleus
Explanation: In this case, a gamma photon imparts its energy and transfers its energy to an atomic electron causing the ejection of an electron from…
Correct answer: Excites the nucleus- A. Radioisotope
- B. Light
- C. Current
- D. Heat
Explanation: Radioisotope tracer technology is widely used to detect leakage of process pipe and heat exchanger system pipe that carries liquid and gas…
Correct answer: Radioisotope- A. 0
- B. 1
- C. 2
- D. 3
Explanation: In the fission reaction uranium absorbs a neutron and forms a barium and krypton nucleus which are extremely unstable and they…
Correct answer: 3- A. 100Sr38
- B. 100Mo42
- C. 98Zr40
- D. 100Zr40
Explanation: In beta decay, mass number reamins the same but proton number increases by 1.
Correct answer: 100Mo42- A. 2.6 x 10^-19C; 3.6 x 10^-28kg
- B. 1.6 x 10^-19C; 1.637 x 10^-27kg
- C. 3.6 x 10^-19C; 2.111 x 10^-27kg
- D. 4.6 x 10^-19C; 9.111 x 10^-27kg
- E. 5.6 x 10^-19C; 8.111 x 10^-27kg
Explanation: You have to memorise the following table.
Correct answer: 1.6 x 10^-19C; 1.637 x 10^-27kg- A. Nine times
- B. Double
- C. Half
- D. 4 times
- E. 7 times
Explanation: The half-life of a radioactive isotope is the amount of time it takes for one half of the radioactive isotope to decay.So the correct…
Correct answer: Half- A. Fission reaction
- B. Fusion reaction
- C. Counter reaction
- D. Chemical reaction
Explanation: Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei.
Correct answer: Fission reaction- A. Slow reactors
- B. Fast reactors
- C. Thermal reactors
- D. Both Slow and Fast reactors
Explanation: In thermal reactors, moderator is used to slow down the prompt neutrons to continue chain reaction with low enriched fuel; while in fast…
Correct answer: Both Slow and Fast reactors- A. 3He2
- B. 4He2
- C. 6He2
- D. 5He2
- E. Both A and B
Explanation: There are two isotopes of helium: 3He2, which is a primordial isotope that was incorporated in Earth as it accreted, and 4He2, an isotope…
Correct answer: Both A and B- A. Nine times
- B. Double
- C. Half
- D. Four times
- E. Seven times
Explanation: The correct option is C (Half) because the half-life represents the period in which half of the radioactive atoms in a sample decay.
Correct answer: Half- A. Slow reactors
- B. Fast reactors
- C. Thermal reactors
- D. Both A and B
Explanation: Nuclear reactors are either slow reactors or fast reactors. The correct answer is therefore D.
Correct answer: Both A and B- A. 2.6 x 10^-19 C; 36. x 10-28 kg
- B. 1.6.x 10-19C; 1.673 x 10^-27kg
- C. 3.6 x 10^-19C; 2.111 x 10^-27kg
- D. 4.6 x 10^-19 C ; 9.111 x 10^-27kg
- E. 5.6 x 10^-19C; 8.111 x 10^-27kg
Explanation: The charge of a proton is indeed 1.6 x 1019 Coulombs (C). This value represents the fundamental unit of positive charge carried by a…
Correct answer: 1.6.x 10-19C; 1.673 x 10^-27kg- A. 10%
- B. 20%
- C. 30%
- D. 50%
- E. 70%
Explanation: The maximum theoretical efficiency of the system is the one corresponding to the efficiency of a Carnot cycle operating between the same…
Correct answer: 50%- A. 7NO/8
- B. No/2
- C. 2No/3
- D. 3No/4
Explanation: The explanation for this question has been added!
Correct answer: 3No/4- A. 89
- B. 90
- C. 91
- D. 95
Explanation: The explanation for this question has been added!
Correct answer: 91- A. radioactive material
- B. the earth's crust
- C. nuclear stations
- D. outer space
Explanation: The explanation for this question has been added!
Correct answer: outer space- A. Core
- B. Moderator
- C. Control rod
- D. Fissile uranium
Explanation: The explanation for this question has been added!
Correct answer: Moderator