COMSATS Physics — Modern and Nuclear Physics
Modern and Nuclear Physics is part of the Physics section of the NTS NAT-IE test COMSATS admits on (10 of the 90 MCQs). It breaks into 3 subtopics, and we hold 15 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (3)
How Modern and Nuclear Physics is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Modern and Nuclear Physics accounts for 4 questions. It appears in 4 of them, about 1 questions a paper. The heaviest was COMSATS Past Paper 06, with 1 question.
| Paper | Questions |
|---|---|
| COMSATS Past Paper 06 | 1 |
| COMSATS Past Paper 04 | 1 |
| COMSATS Past Paper 02 | 1 |
| COMSATS Past Paper 01 | 1 |
Modern and Nuclear Physics MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 06 · Modern and Nuclear Physics
An alpha particle is:
- A.an electron
- B.a helium nucleus
- C.a neutron
- D.a photon
Show answer
Answer: B. a helium nucleus — An alpha particle has 2 protons and 2 neutrons: a helium-4 nucleus.
- Q2 · COMSATS Past Paper 04 · Modern and Nuclear Physics
The Balmer series of the hydrogen spectrum lies in the:
- A.infrared region
- B.visible region
- C.ultraviolet region
- D.X-ray region
Show answer
Answer: B. visible region — Transitions down to n = 2 give the Balmer lines, which are visible.
- Q3 · COMSATS Past Paper 02 · Modern and Nuclear Physics
The half-life of a radioactive substance is 5 days. What fraction of it remains after 15 days?
- A.1/4
- B.1/16
- C.1/8
- D.1/3
Show answer
Answer: C. 1/8 — 15 days = 3 half-lives; (1/2)³ = 1/8.