NUST NET Physics — Electronics
Electronics is part of the FSc Physics course that NUST NET-Engineering draws on (Physics is 60 of the 200 MCQs). It breaks into 2 subtopics, and we hold 42 NET-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Electronics is tested
Across the 8 NET-pattern papers on ParhaiKrlo, Electronics accounts for 16 questions. It appears in all 8, about 2 questions a paper. The heaviest was NUST NET Past Paper 07, with 2 questions.
| Paper | Questions |
|---|---|
| NUST NET Past Paper 07 | 2 |
| NUST NET Past Paper 08 | 2 |
| NUST NET Past Paper 05 | 2 |
| NUST NET Past Paper 06 | 2 |
| NUST NET Past Paper 03 | 2 |
| NUST NET Past Paper 04 | 2 |
| NUST NET Past Paper 01 | 2 |
| NUST NET Past Paper 02 | 2 |
Electronics MCQs from the NET-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · NUST NET Past Paper 07 · Electronics
A 50 Hz AC supply is fed to a full-wave rectifier. The frequency of the ripple in the output is:
- A.50 Hz
- B.25 Hz
- C.100 Hz
- D.200 Hz
Show answer
Answer: C. 100 Hz — A full-wave rectifier doubles the frequency: ripple = 2 × 50 = 100 Hz.
- Q2 · NUST NET Past Paper 08 · Electronics
The output of a two-input NAND gate is 0 only when:
- A.both inputs are 0
- B.both inputs are 1
- C.the inputs are different
- D.any one input is 1
Show answer
Answer: B. both inputs are 1 — NAND = NOT(AND): the output is 0 only when both inputs are 1.
- Q3 · NUST NET Past Paper 05 · Electronics
The Boolean expression (A + B)(A + B̄) simplifies to (B̄ is NOT B):
- A.B
- B.1
- C.A·B
- D.A
Show answer
Answer: D. A — (A + B)(A + B̄) = A + BB̄ = A + 0 = A.