- (A) 1/4f
- (B) 1/2f
- (C) frequency lower than 20 Hz
- (D) 2f
Exam preparation MCQs with answers
Practice Pakistan's most useful MCQs for competitive exams
Prepare for NTS, PPSC, FPSC and subject-wise tests with fresh multiple choice questions, clear options and quick answer reveal.
Latest MCQs
- (A) sound wave only
- (B) light wave only
- (C) both sound and light waves
- (D) neither sound nor light wave
- (A) diffraction of sound waves
- (B) constructive and destructive interference
- (C) polarization
- (D) destructive interference
- (A) silence zone
- (B) interference
- (C) beats
- (D) resonance
- (A) 313°C
- (B) 586°C
- (C) 819°C
- (D) 1172°C
- (A) 20000 to 30000 hertz
- (B) 10 to 20 hertz
- (C) 2000 to 4000 hertz
- (D) 6000 to 8000 hertz
- (A) increases
- (B) decreases
- (C) remains unchanged
- (D) may increase or decrease
- (A) 1.61 ms-1
- (B) 61.0 ms-1
- (C) 0.61 ms-1
- (D) 2.00 ms-1
- (A) they are transverse waves
- (B) they are stationary waves
- (C) they require material medium for propagation
- (D) they do not have enough energy
- (A) heat energy into electrical energy
- (B) heat energy into light energy
- (C) heat energy into mechanical energy
- (D) mechanical energy into heat energy
