Modern Physics Mixed Drill

Mixed quantum, atomic, and nuclear MCQs. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

Half-life is the time for?

Answer: Half the radioactive nuclei to decay

T½ is time for N → N/2.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

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QUESTION NO 02

E = mc² relates?

Answer: Mass and energy equivalence

Rest energy E₀ = mc²; mass–energy equivalence.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

QUESTION NO 03

Pair production requires photon energy at least?

Answer: 1.022 MeV

Creating e⁻e⁺ needs ≥ 2 × 511 keV = 1.022 MeV.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

QUESTION NO 04

X-rays are produced when?

Answer: Fast electrons strike a metal target

Bremsstrahlung/characteristic X-rays arise from electron–target interactions.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

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QUESTION NO 05

Nuclear fission is?

Answer: Splitting of a heavy nucleus

Fission: heavy nucleus splits into lighter fragments, releasing energy.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

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QUESTION NO 06

Nuclear fusion is?

Answer: Combining light nuclei

Fusion joins light nuclei (e.g. in stars) releasing energy.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

QUESTION NO 07

Heisenberg uncertainty principle limits simultaneous knowledge of?

Answer: Position and momentum

Δx Δp ≥ ħ/2 (order-of-magnitude form often taught as ~ h/4π).

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

QUESTION NO 08

Rest mass of a photon is?

Answer: Zero

Photons are massless; they still carry energy and momentum E/c.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

QUESTION NO 09

Photoelectric effect supports the?

Answer: Particle nature of light

Einstein explained photoelectric effect using photons (quanta of light).

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

QUESTION NO 10

Energy of a photon is?

Answer: hf

E = hf = hc/λ.

Shahzad Mahota @shahzad-mahota

302 Quizzes

2930 Questions

00 Likes

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Shahzad Mahota

@shahzad-mahota

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Modern Physics Mixed Drill

Half-life is the time for?

E = mc² relates?

Pair production requires photon energy at least?

X-rays are produced when?

Nuclear fission is?

Nuclear fusion is?

Heisenberg uncertainty principle limits simultaneous knowledge of?

Rest mass of a photon is?

Photoelectric effect supports the?

Energy of a photon is?

Published By

Shahzad Mahota

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Modern Physics Mixed Drill

Half-life is the time for?

Explanation

E = mc² relates?

Explanation

Pair production requires photon energy at least?

Explanation

X-rays are produced when?

Explanation

Nuclear fission is?

Explanation

Nuclear fusion is?

Explanation

Heisenberg uncertainty principle limits simultaneous knowledge of?

Explanation

Rest mass of a photon is?

Explanation

Photoelectric effect supports the?

Explanation

Energy of a photon is?

Explanation

Published By

Shahzad Mahota

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