COMSATS Physics — Electromagnetism
Electromagnetism 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 16 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (3)
How Electromagnetism is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Electromagnetism accounts for 3 questions. It appears in 3 of them, about 1 questions a paper. The heaviest was COMSATS Past Paper 07, with 1 question.
| Paper | Questions |
|---|---|
| COMSATS Past Paper 07 | 1 |
| COMSATS Past Paper 05 | 1 |
| COMSATS Past Paper 03 | 1 |
Electromagnetism MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Electromagnetism
The frequency of the domestic AC supply in Pakistan is:
- A.60 Hz
- B.50 Hz
- C.100 Hz
- D.220 Hz
Show answer
Answer: B. 50 Hz — Pakistan's mains supply is about 220 V at 50 Hz.
- Q2 · COMSATS Past Paper 05 · Electromagnetism
Lenz's law is a consequence of the law of conservation of:
- A.momentum
- B.energy
- C.mass
- D.charge
Show answer
Answer: B. energy — The induced current opposes the change; otherwise energy would be created from nothing.
- Q3 · COMSATS Past Paper 03 · Electromagnetism
A charged particle moving parallel to a uniform magnetic field experiences:
- A.a force along the field
- B.a force opposite to its motion
- C.the maximum magnetic force
- D.no magnetic force
Show answer
Answer: D. no magnetic force — F = qvB sin θ; parallel motion means θ = 0, so F = 0.