ISC Physics Previous Year Question Paper. We covered all the ISC Physics Previous Year Question Paper in this post for free so that you can practice well for the exam.
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ISC Physics Previous Year Question Paper Mock Test for Students
A tuning fork gives 5 beats with a 40 cm length of sonometer wire. If the length of the wire is shortened by 1 cm, the number of beats is still the same. The frequency of the fork is :
(A) 385 Hz
(B) 320 Hz
(C) 395 Hz
(D) 400 Hz
Option c – 395 Hz
A tuning fork of frequency 480 Hz is used to vibrate a sonometer wire having a natural frequency of 240 – Hz. The wire will vibrate with a frequency of
(A) 240 Hz
(B) 480 Hz
(C) 720 Hz
(D) Will not vibrate
Option b – 480 Hz
A wire is subjected to a certain tension and vibrates with a frequency of 320 Hz. What would be the frequency of vibrations, if the tension is increased four times?
(A) 160 Hz
(B) 320 Hz
(C) 640 Hz
(D) 1280 Hz
Option c – 640 Hz
Two wires of the same material and having the same diameter have their lengths in the ratio 1 : 3 and are under tensions in the ratio 1 : 4. Then the ratio of their fundamental frequency is :
(A) 3 : 2
(B) 3 : 4
(C) 4 : 3
(D) 1 : 3
Option a – 3 : 2
A string when stretched with a weight of 9 kgwt produced a note of the frequency of 256 Hz. Calculate the weight to produce an octave of the note :
(A) 9/4 kgwt
(B) 36 kgwt
(C) 18 kgwt
(D) 40 kgwt
Option b – 36 kgwt
The tension in a sonometer wire is increased nine times. The fundamental frequency of vibration becomes :
(A) 9 times
(B) 3 times
(C) 1/3 times
(D) 1/9 times wire
Option b – 3 times
A stretched string of length 1 m has a mass per unit length of 0.5 g/m. The tension in the string is 20 N. If it is plucked at a distance of 25 cm from one end, the frequency of vibration will be :
(A) 100 Hz
(B) 200 Hz
(C) 300 Hz
(D) 400 Hz
Option b – 200 Hz
If the tension in a sonometer wire is increased by a factor of four. The fundamental frequency of vibration changes by a factor of
(A) 4
(B) 1/4
(C) 2
(D) 1/2
Option c – 2
A sonometer wire is subjected to a certain tension. How will the frequency of vibrations alter, if the tension is increased four times and the vibrating length of the wire is doubled? :
(A) The frequency will increase
(B) The frequency will decrease
(C) The frequency will not change
(D) The frequency may increase or decrease nine times.
Option c – The frequency will not change
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