A New Approach to ICSE Physics Class 9. We covered all the A New Approach to ICSE Physics Class 9 in this post for free so that you can practice well for the exam.
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ICSE Physics Class 9 Quiz Questions for Students
A tuning fork of frequency 100 Hz when sounded together with another tuning fork of unknown frequency produces 2 beats/ second. On loading the tuning fork whose frequency is not known and sounded together with a tuning fork of frequency 100 Hz produces one beat, then the frequency of the other tuning fork is :
(A) 102 Hz
(B) 99 Hz
(C) 98 Hz
(D) 101 Hz
Option a – 102 Hz
When two tuning forks A and B are sounded together, x beat/second is heard. The frequency of A is n. Now when one prong of fork B is loaded with a little wax, the number of beats/seconds decreases. The frequency of fork B is :
(A) n + x
(B) n-x
(C) n-x²
(D) n – 2x
Option a – n + x
A wave of frequency 500 Hz has a velocity of 360 m/s. The distance between the two nearest points which are 60° out of phase is :
(A) 0.7 cm
(B) 12 cm
(C) 70 cm
(D) 120 cm
Option b – 12 cm
As a transverse wave strikes against a wall :
(A) Its phase changes by 180°, but speed does not change
(B) Its phase does not change, but speed changes
(C) Its speed changes and phase changes by 180°
(D) Nothing can be predicted about changes in its speed and phase
Option a – Its phase changes by 180°, but speed does not change
Which of the following parameters undergo a change when the wave is reflected from a rigid boundary? :
(A) Wave velocity
(B) Wavelength
(C) Amplitude
(D) Frequency
Option a – Wave velocity
The sound carried by the air from a sitar to a listener is a wave of the following type :
(A) Longitudinal stationery
(B) Transverse progressive
(C) Transverse stationary
(D) Longitudinal progressive
Option d – Longitudinal progressive
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