A New Approach to ICSE Physics Class 9 Solutions. We covered all the A New Approach to ICSE Physics Class 9 Solutions in this post for free so that you can practice well for the exam.
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ICSE Physics Class 9 Trivia for Students
When two sound waves are superimposed beats are produced when they have :
(A) Different amplitudes and phases
(B) Different velocities
(C) Different phases
(D) Different frequencies
Option d – Different frequencies
Beats are examples of
(A) Diffraction
(B) Polarisation
(C) Interference
(D) Reflection
Option c – Interference
In the production of beats, the two sources must have :
(A) Different frequencies, same amplitude, and same phase
(B) Different frequencies and the same phase
(C) Different frequencies and same amplitudes
(D) Different frequencies
Option d – Different frequencies
Beats are the result of
(A) Diffraction
(B) Destructive interference
(C) Constructive and destructive interference
(D) Superposition of two waves of nearly equal frequencies
Option d – Superposition of two waves of nearly equal frequencies
Two tuning forks are sounded together and beats are heard. We can infer that :
(A) The pitches of the two notes are nearly the same
(B) The intensities of the two notes are nearly the same
(C) The qualities of the two notes are nearly the same
(D) The velocities of the two sounds are nearly the same
Option a – The pitches of the two notes are nearly the same
Two sound waves of amplitudes a1 and a2 produce n beats/sec. The ratio of the intensity of maxima and minima is 36 : 4. The amplitudes a1 and a2 are :
(A) 36 and 4
(B) 6 and 2
(C) 4 and 2
(D) 3 and 1
Option c – 4 and 2
The intensity ratio of the two waves is 1 : 16. The ratio of their amplitudes is :
(A) 1:16
(B) 1 : 4
(C) 4 : 1
(D) 2 : 1
Option b – 1 : 4
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