Physics Past Questions and Answers

Which of the following media allow the transmission of sound wave through them i. Air. ii. Liquids. iii. Solids.

A I and ii only
B I and iii only
C Ii and iii only
D I,ii and iii

Question 17:

Which of the following properties is/are common to all waves? i. Diffraction ii. Refraction iii. Interference

A I only
B Ii only
C Ii and iii
D I, ii, and iii

Question 18:

A piano wire 0.5m long has a total mass of 0.01kg and is stretched with a tension of 800N. Calculate the frequency of the wire when it sounds its fundamental note

A 200Hz
B 100Hz
C 4Hz
D 2Hz

Question 19:

A note is called an octave of another note when

A Its frequency is twice that of the first note
B Its frequency is half of the first note
C The notes have the same fundamental frequency
D Its periodic time is twice that of the first note

Question 20:

Which of the following factors affects the speed of sound in air? i. Temperature ii. pressure iii. Frequency

A I only
B Ii only
C I and ii only
D Ii and iii only