PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 When damping is small amplitude of vibrational resonance will be small Large Infinite Un changed
2 A simple pendulum suspended from the celling of a lift has a time period T when the lift falls freely the time period of the pendulum will become Zero T/9.8 9.8 T Infinity
3 A spring of force constant k is out into three equal pats. The force constant of earth part will b e. k 3 k k/3 k/2
4 Restoring force in the SHM is Centripetal Frictional Conservative Non conservative
5 The curve between the acceleration and velocity of a body in SHM is a Circle Ellipse Square Parabola
6 The graph between restoring force and time in SHM is a Straight line Parabola Sine wave Circle
7 What is the number of degree of freedom of an oscillating simple gravity pendulum 1 2 3 4
8 Which of the following quantities associated with SHM does not vary periodically. velocity Displacement Acceleration Total energy
9 The SI unit of spring constant is identical with that of. Force Pressure Surface tension Loudness
10 Frequency of second pendulum is. 0.5 Hz 1.0 Hz 1.5 Hz 2.0 Hz
11 If mass attached to a spring increases then its time period. Increases Decreases Remains constant Decreases slightly
12 The time period of a simple pendulum is independent of its. Length Mass Acceleration due to gravity Restoring force
13 If length of second pendulum becomes four times than its time period will become Two times Four times Six times Eight times
14 Length of second pendulum is 98 cm 99 cm 99.2 cm 100 cm
15 A particle performs SHM of amplitude 0.020 and frequency 2.5 Hz. What is its maximum speed. 0.050 m s-1 0.125 m s-1 0.314 m s-1 0.75 m s-1
16 An object at the end of a spring oscillates with SHM of angular frequency 2 rad s-1 What is the period of oscillation. 0.32 s 0.50 s 0.80 s 3.1 s
17 A particle executing simple harmonic oscillations of frequency 100 Hz has an amplitude of 0.1 cm The velocity amplitude of the particleis. 20 micro cm s-1 10 micro cm s-1 20 cm s-1 19 cm s-1
18 Oscillatory motion is always under An applied force Restoring force and inertia A periodic force A gravitational force
19 Resonance phenomenon in a vibrating body May increase the amplitude May decrease the amplitude May not affected the amplitude All of the above
20 The wave form of SHM is a Sine wave Cosine wave Square wave Electromagnetic wave
21 Angular simple harmonic motion is. Periodic rectilinear motion Independent of any applied torque Periodic rotational motion Never defined
22 A body of mass 2 kg attached to a spring is pulled to a distance of 4 cm What will be the value of spring constant K. 490 N m-1 980 N m-1 1260 N m-1 1960- N m-1
23 In the case of forced oscillations frequency of oscillation is. The natural damped frequency The natural undamped frequency The frequency of the external periodic force Some other frequency
24 Two simple pendulums of the same length but having different masses Have different frequencies Will have period proportional to their masses Will have periods independent of their length<div><br></div> Have the same period
25 In an Isolated system , total energy of the vibrating's mass and spring is Low High Constant Variable
26 tuning a radio set is an example of. Musical resonance Electrical resonance Mechanical resonance Damping
27 The process where by energy is dissipated from the oscillating system is called. Resonance Damping Forced oscillation Free oscillation
28 Which of the following is not essential for the free oscillations of a mass attached to a spring. Elasticity Gravity Inertia Restoring force
29 The circular motion of a particles with constant speed is. Periodic and SHM Periodic but not SHM SHM and not periodic Neither periodic nor SHM
30 The total energy of a body executing SHM is directly proportional to The amplitude The square of the amplitude Square root of the amplitude Reciprocal of the amplitude
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