COMSATS Physics — Current Electricity
Current Electricity is part of the Physics section of the NTS NAT-IE test COMSATS admits on (10 of the 90 MCQs). It breaks into 2 subtopics, and we hold 19 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Current Electricity is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Current Electricity 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 05 | 1 |
| COMSATS Past Paper 02 | 1 |
| COMSATS Past Paper 01 | 1 |
Current Electricity MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 06 · Current Electricity
The resistance of a metal wire increases when:
- A.its cross-sectional area is increased
- B.its temperature is lowered
- C.it is replaced by a thicker wire of the same metal
- D.its length is increased
Show answer
Answer: D. its length is increased — R = ρL/A, so R rises with length.
- Q2 · COMSATS Past Paper 05 · Current Electricity
A 100 W bulb is switched on for 10 hours. How much energy does it use, in kilowatt-hours?
- A.10 kWh
- B.1,000 kWh
- C.0.1 kWh
- D.1 kWh
Show answer
Answer: D. 1 kWh — Energy = 0.1 kW × 10 h = 1 kWh.
- Q3 · COMSATS Past Paper 02 · Current Electricity
Two resistors of 4 Ω and 6 Ω are connected in series. What is their equivalent resistance?
- A.24 Ω
- B.2 Ω
- C.2.4 Ω
- D.10 Ω
Show answer
Answer: D. 10 Ω — In series, resistances add: 4 + 6 = 10 Ω.