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 43 of 63
- A. a proton
- B. a neutron
- C. a positron
- D. an electron
Explanation: The explanation for this question has been added!
Correct answer: a neutron- A. Quarks
- B. Leptons
- C. Photons
- D. Hadrons
Explanation: The explanation for this question has been added!
Correct answer: Hadrons- A. A
- B. B
- C. C
- D. D
Explanation: The explanation for this question has been added!
Correct answer: B- A. Isotopes
- B. Isobars
- C. Isomers
- D. Isotherms
Explanation: Isobars are nuclei that have the same mass number (A), but a different atomic number (Z).
Correct answer: Isobars- A. 1
- B. 1200
- C. 1300
- D. None of these
Explanation: Electron is 1836 times lighter than that of a neutron. We may say that the ratio of mass of electron to mass of neutron is 1836:1.
Correct answer: None of these- A. Charged particles
- B. Uncharged particles
- C. Neutrons
- D. All of these options are correct
Explanation: An atom is neutral if it has an equal number of protons and electrons which are charged particles. Neutrons are not charged particles.
Correct answer: Charged particles- A. Full life decay
- B. Quarter life decay
- C. Time for half of the element to decay
- D. All of these options are correct
Explanation: Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.
Correct answer: Time for half of the element to decay848. If a person is irradiated accidentally by high radiation, what immediate effects would be seen?
- A. Skin burning
- B. High blood pressure
- C. Fever
- D. Any of these symptoms can be seen
Explanation: Being exposed to a lot of radiation over a short period of time, such as from a radiation emergency, can cause skin burns.
Correct answer: Any of these symptoms can be seen- A. Copper-60
- B. Cobalt-60
- C. Gold
- D. Silver
Explanation: Cobalt-60 emits two high energy gamma rays, making cobalt-60 both an internal and external hazard.
Correct answer: Cobalt-60- A. Remains constant
- B. Decreases by 1
- C. Increases by 1
- D. Decreases by 2
Explanation: On emitting a β particle the number of nucleons in the nucleus (i.e. protons and neutrons) remains same, but the number of neutrons is…
Correct answer: Remains constant- A. 6 hours
- B. 15 hours
- C. 8 hours
- D. 15 days
Explanation: Sodium-24 is a radioactive isotope of sodium with a half-life of approximately 15 hours.
Correct answer: 15 hours- A. Decreases in 'Z' by 4 and decreases in 'A' by 2
- B. Decreases in 'A' by 1 and 'Z' remains same
- C. Decreases in 'Z' by 1 and 'A' remains same
- D. Decreases in 'A' by 4 and decreases in 'Z' by 2
Explanation: The 'A' (atomic mass) of an alpha particle is 4 and the 'Z' (atomic number) is 2.
Correct answer: Decreases in 'A' by 4 and decreases in 'Z' by 2- A. 1 gray
- B. 1000 gray
- C. 0 gray
- D. 100 gray
Explanation: Given:Energy = E = 10 JMass = m = 10 g = 0.01 kgAbsorbed dose = ?Formula:As we know that:Absorbed dose = Energy / mass = 10 / 0.01 = 1000…
Correct answer: 1000 gray- A. Carbon-14
- B. Uranium-235
- C. Thorium
- D. Iodine-131
Explanation: Radioactive Iodine(also called RAL) can be used to treat thyroid cancer.
Correct answer: Iodine-131- A. When protons and neutrons combine to form a nucleus, the mass decreases because energy is gained.
- B. The apparent mass loss is due to inaccuracies in measuring the mass of the nucleus.
- C. This statement is not true in most cases.
- D. When protons and neutrons combine to form a nucleus, some mass is converted into energy, resulting in mass loss.
Explanation: The correct answer is that when protons and neutrons combine to form a nucleus, some mass is converted into energy, leading to a mass…
Correct answer: When protons and neutrons combine to form a nucleus, some mass is converted into energy, resulting in mass loss.- A. None
- B. 25 kg
- C. 75 kg
- D. 50 kg
Explanation: The concept of half-life is crucial in understanding how radioactive substances decay over time.
Correct answer: 25 kg- A. The difference in masses of free neutrons and protons.
- B. The difference in masses of free neutrons and bonded nucleus
- C. The difference in masses of free nuclear constituents and bonded nucleus
- D. Difference between atomic mass and atomic number
Explanation: The correct answer is Option C. The mass defect refers to the difference between the total mass of individual nucleons (protons and…
Correct answer: The difference in masses of free nuclear constituents and bonded nucleus- A. 2.5 x 10^9 years
- B. 2.5 x 10^8 years
- C. 4.5 x 10^9 years
- D. None of these
Explanation: The two isotopes are in radioactive equilibrium. Hence activities of the two will be equal.
Correct answer: None of these- A. Boltzmann
- B. Planck
- C. Solar constant
- D. All of these
Explanation: The Boltzmann constant relates the average kinetic energy of particles in a gas to the temperature of the gas.
Correct answer: Boltzmann- A. m.k
- B. m/k
- C. k/m
- D. None of these options are correct
Explanation: Wein's Constant:According to Wien's law the product of wavelength corresponding to maximum intensity of radiation and temperature of body…
Correct answer: m.k