Previous Year Question Paper Class 12 Physics Bihar Board. We covered all the Previous Year Question Paper Class 12 Physics Bihar Board in this post for free so that you can practice well for the exam.
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Class 12 Physics Bihar Board MCQs for Students
A spring of force constant k is cut into two equal parts. Then the force constant of each piece is :
(A) k
(B) 4 k
(C) k/2
(D) 2 k
Option d – 2 k
A spring-mass system oscillates with frequency n. If it is taken in an elevator slowly accelerating upward, the frequency will :
(A) Increases
(B) Decrease
(C) remains constant
(D) can not be predicted
Option a – Increases
M kg weight is suspended from a weightless spring and it has a time period T. If now 4M kg weight is suspended from the same spring, the new time period will be :
(A) T
(B) T/2
(C) 2 T
(D) 4 T
Option c – 2 T
A mass of 1 kg attached to the bottom of a spring has a certain frequency of vibration. The following mass has to be added to it in order to reduce the frequency by half :
(A) 1 kg
(B) 2 kg
(C) 3 kg
(D) 4 kg
Option c – 3 kg
The amplitude of a damped oscillator decreases to 0.9 times its original magnitude in 5s. In another 10s it will decrease to times its original magnitude, where a equals :
(A) 0.7
(B) 0.81
(C) 0.729
(D) 0.6
Option c – 0.729
A vertical light spring is stretched by 2 cm when a weight of 10 g is attached to its free end. The weight is further pulled down by 1 cm and released. The frequency of oscillation is :
(A) 1.69 Hz
(B) 3.52 Hz
(C) 1 Hz
(D) 4.341 Hz
Option b – 3.52 Hz
A spring is stretched by 0.2 m when the mass of 0.5 kg is suspended. Calculate the period of the spring when a mass of 0.25 kg is suspended and put to oscillate (g = 10 m/s²) :
(A) 3.14 s
(B) 0.314 s
(C) 0.628 s
(D) 6.28 s
Option c – 0.628 s
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