⚛️ Physics MCQ Questions

Set – 2 | General Science Practice for NEET & Other Competitive Exams

Boost your preparation with exam-focused Physics MCQs and instant answer verification – useful for NEET, AIIMS, JIPMER, BPSC, UPPCS, MPPSC, RRB, SSC, and other state & national-level exams.

Q11. Which particle played a role in challenging aspects of Einstein’s theory of relativity?

(A) Micro-wave Photon
(B) Liquid crystal
(C) Light emitting diode
(D) Neutrino

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Correct answer is Neutrino. Neutrinos are nearly massless particles that played a key role in testing predictions of relativity and energy conservation in nuclear reactions.

Q12. Cyclotrons are primarily used to accelerate which of the following?

(A) Neutrons
(B) Protons
(C) Atoms
(D) Ions

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Correct answer is Protons. Cyclotrons are used to accelerate charged particles, especially protons, to high energies for nuclear physics experiments and medical applications.

Q13. Which of the following pairings is incorrectly matched?

(A) Discovery of Meson – Hideki Yukawa
(B) Discovery of Positron – C.D. Anderson & U.F. Hess
(C) Theory of energy production in the Sun and stars – H.A. Bethe
(D) Synthesis of transuranic elements – Enrico Fermi

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Correct answer is Synthesis of transuranic elements – Enrico Fermi. Enrico Fermi did not synthesize transuranic elements; other scientists carried out these discoveries.

Q14. Which of the following statements is NOT correct?

(A) Theory of evolution was propounded by Charles Darwin
(B) Telephone was invented by Graham Bell
(C) Dry ice is nothing but solid carbon dioxide
(D) The breaking apart of the nucleus of an atom is called fusion

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Correct answer is The breaking apart of the nucleus of an atom is called fusion. This process is actually called fission, not fusion.

Q15. Which device can detect gamma-emitting isotopes in drinking water?

(A) Microscope
(B) Lead plate
(C) Spectrophotometer
(D) Scintillation counter

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Correct answer is Scintillation counter. This device detects gamma radiation in water and other substances with high sensitivity.

Q16. Among the following radiations, which carries the highest energy?

(A) Ultra-violet
(B) X-ray
(C) Visible
(D) Infra-red

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Correct answer is Ultra-violet. Among the listed options, ultraviolet radiation has the highest energy due to its shorter wavelength compared to visible and infrared light.

Q17. Energy of the Sun is mainly released due to which process?

(A) Nuclear fission
(B) Nuclear fusion
(C) Oxidation reactions
(D) Reduction reactions

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Correct answer is Nuclear fusion. The Sun releases energy by fusing hydrogen nuclei into helium in its core.

Q18. The primary source of energy for stars is?

(A) Chemical reaction
(B) Nuclear fusion
(C) Nuclear fission
(D) Gravitational pull

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Correct answer is Nuclear fusion. Stars, including the Sun, generate energy primarily through fusion of hydrogen into helium.

Q19. Which of the following is considered the renewable energy source in stars?

(A) Hydrogen changing into helium
(B) Helium changing into hydrogen
(C) Radioactive decay
(D) Excess oxygen

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Correct answer is Hydrogen changing into helium. The fusion of hydrogen into helium in stars continuously generates energy, making it a renewable source of stellar energy.

Q20. The main source of energy emitted by the Sun is?

(A) Nuclear fusion
(B) Photoelectric effect
(C) Cherenkov effect
(D) Nuclear fission

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Correct answer is Nuclear fusion. The Sun emits energy primarily through nuclear fusion in its core, where hydrogen nuclei combine to form helium, releasing tremendous energy.

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