Class 11 Physics Midterm Question Paper. We covered all the Class 11 Physics Midterm Question Paper in this post for free so that you can practice well for the exam.
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Class 11 Physics Midterm MCQs for Students
Two sound waves of wavelengths 0.87 m and 0.885 m produce 7 beats per second. The velocity of sound in the air will be near about :
(A) 359 m/s
(B) 340 m/s
(C) 280 m/s
(D) 320 m/s
Option a – 359 m/s
Eleven tuning forks are arranged in ascending order of frequencies. Each fork produces 8 beats per second with the other. The last fork is an octave of the first. The frequency of the 10th fork is :
(A) 80 Hz
(B) 152 Hz
(C) 172 Hz
(D) 184 Hz
Option b – 152 Hz
A tuning fork C sounded together with a tuning fork D of frequency 256 Hz emits 2 beats. On loading the tuning fork D the number of beats, heard is 1 per second. The frequency of tuning fork C is :
(A) 257 Hz
(B) 256 Hz
(C) 258 Hz
(D) 254 Hz
Option d – 254 Hz
Two bodies have frequencies of 252 and 256 vibrations per second respectively. The beat frequency produced when they vibrate together is :
(A) 16
(B) 12
(C) 20
(D) 4
Option d – 4
When a tuning fork of frequency 341 Hz is sounded with another tuning fork, six beats per second are heard. When the second tuning fork is loaded with wax and sounded with the first tuning fork, the number of beats is two per second. The natural frequency of the second tuning fork is :
(A) 335 Hz
(B) 339 Hz
(C) 343 Hz
(D) 347 Hz
Option d – 347 Hz
Two tuning forks A and B produce 8 beats per second when sounded together. When B is slightly loaded with wax the beats are reduced to 4 per second. If the frequency of A is 512 Hz, the frequency of B is :
(A) 508 Hz
(B) 516 Hz
(C) 504 Hz
(D) 520 Hz
Option d – 520 Hz
A source of the sound of frequency 450 cycle/sec is moving, towards a stationary observer with 34 m/s. If the speed of sound is 340 m/s, then the apparent frequency will be :
(A) 410 cycle/sec
(B) 500 cycle/sec
(C) 550 cycle/sec
(D) 450 cycle/sec
Option b – 500 cycle/sec
Ten tuning forks are arranged in increasing order of frequency in such a way that any two nearest tuning forks produce 4 beats per second. The highest frequency is twice the lowest. The possible highest and lowest frequencies are :
(A) 80 Hz and 40 Hz
(B) 100 Hz and 50 Hz
(C) 44 Hz and 22 Hz
(D) 72 Hz and 36 Hz
Option d – 72 Hz and 36 Hz
Two tuning forks have frequencies of 450 Hz and 454 Hz respectively. On sounding these forks together, the time interval between successive maximum intensities will be :
(A) 1/4 second
(B) 1/2 second
(C) 1 second
(D) 2 second
Option a – 1/4 second
A tuning fork gives 5 beats with another tuning fork of frequency 100 Hz. When the first tuning fork is loaded with wax, then the number of beats remains unchanged, then what will be the frequency of the first tuning fork?
(A) 95 Hz
(B) 100 Hz
(C) 105 Hz
(D) 110 Hz
Option c – 105 Hz
Two tuning forks of frequency 256 and 258 vibrations per second are sounded together, then the time interval between consecutive maxima heard by the observer is :
(A) 2 sec
(B) 0.5 sec
(C) 250 sec
(D) 252 sec
Option b – 0.5 sec
Two tuning forks A and B vibrating simultaneously produce 5 beats. The frequency of B is 512 Hz. It is seen that if one arm of A is filed, then the number of beats increases. The frequency of A will be :
(A) 502 Hz
(B) 507 Hz
(C) 517 Hz
(D) 522 Hz
Option c – 517 Hz
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