Previous Year Question Paper of Class 12 Bihar Board Physics. We covered all the Previous Year Question Paper of Class 12 Bihar Board Physics in this post for free so that you can practice well for the exam.
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Class 12 Bihar Board Physics MCQs for Students
A pipe closed at one end produces a fundamental note of 412 Hz. It is cut into two pieces of equal length. The fundamental notes produced by the two pieces are :
(A) 412 Hz, 206 Hz
(B) 824 Hz, 206 Hz
(C) 1648 Hz, 824 Hz
(D) 824 Hz, 412 Hz
Option c – 1648 Hz, 824 Hz
Two organ pipes, each closed at one end give 5 beats/sec when emitting their fundamental notes. If their lengths are in the ratio 51 : 50, their fundamental frequencies are :
(A) 250 Hz, 255 Hz
(B) 260 Hz, 265 Hz
(C) 255 Hz, 260 Hz
(D) 265 Hz, 270 Hz
Option a – 250 Hz, 255 Hz
An open organ pipe sounds a fundamental note of frequency 230 Hz. If the speed of sound in air is 330 m/s, then the lengths of the pipe are near:
(A) 0.25 m
(B) 0.50 m
(C) 0.75 m
(D) 2.00 m
Option c – 0.75 m
A cylindrical tube open at both ends has a fundamental frequency of n. If one of the ends is closed, the frequency becomes :
(A) 0.5 n
(B) n
(C) 2n
(D) 4n
Option a – 0.5 n
If the velocity of sound in air is 350 m/s. The frequency of fundamental note emitted by a tube of length 50 cm open at both ends is :
(A) 50 Hz
(B) 175 Hz
(C) 350 Hz
(D) 750 Hz
Option c – 350 Hz
The velocity of sound in air is 320 m/s. A pipe closed at one end has a length of 1 m. Neglecting end correction, the air column in the pipe can resonate. for the sound of frequency :
(A) 80 Hz
(B) 240 Hz
(C) 320 Hz
(D) 400 Hz
Option a – 80 Hz
A tube closed at one end and containing air, produces, when excited, the fundamental note of frequency 512 Hz. If the tube is open at both ends, the fundamental frequency that can be excited is (in Hz) :
(A) 1024 Hz
(B) 512 Hz
(C) 256 Hz
(D) 128 Hz
Option a – 1024 Hz
The minimum length of a tube, open at both ends, that resonates with a tuning fork of frequency 350 Hz is (velocity of sound in air = 350 m/s) :
(A) 0.25 m
(B) 0.5 m
(C) 1 m
(D) 2 m
Option b – 0.5 m
The frequency of the fundamental mode of vibration of an open organ pipe is 400 Hz. If one end of the pipe is closed, the fundamental frequency will be :
(A) 200 Hz
(B) 400 Hz
(C) 600 Hz
(D) 800 Hz
Option a – 200 Hz
The velocity of sound in air is 330 m/s. The fundamental frequency of an organ pipe open at both ends and of length 0.3 m will be :
(A) 200 Hz
(B) 550 Hz
(C) 300 Hz
(D) 275 Hz
Option b – 550 Hz
An air column in a pipe closed at one end, will resonance with a vibrating tuning fork of be in frequency 680 Hz, if the length of the column in meters is (velocity of sound in air = 340 m/s) :
(A) 0.25
(B) 0.125
(C) 0.185
(D) 0.5
Option b – 0.125
A closed organ pipe and an open organ pipe have their first overtones of the same frequency. Their lengths are in the ratio :
(A) 1 : 2
(B) 2 : 3
(C) 3 : 4
(D) 4 : 3
Option c – 3 : 4
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