Temperature of a gas increases from 10C to 20C, what happens to the viscosity of the gas? Increases Decreases Remains same None of these Answer: Increases
Terminal velocity does not depends upon Falling time Area mass viscosity Answer: Falling time
[PPSC 2020, 2022) Bernoulli equation is an expression of: Law of conservation of mass Law of conservation of Energy Answer: Law of conservation of Energy
Moment of inertia of __ will be used while studying Earth’s Orbital Angular momentum? Sphere Disc Hoop None of these Answer: Hoop
A sphere, disk and hoop with same mass and same radius is left on an inclined plane, which of the three will reach the ground first? Sphere Disc Hoop None of these Answer: Sphere
The time period of simple pendulum is 1 sec when displacing at an angle of 1 degree. If the angle is doubled, the period becomes: 1 sec 2 sec 0.5 sec None of these Answer: 1 sec
A tunnel has been dug through the center of the earth and a ball is released in it. the ball will go through the tunnel and reach the other end Will stop at the center of the earth perform simple harmonic motion None of these Answer: perform simple harmonic motion
For a watch, the time period of the second’s hand is: 1 sec 1 minute 1 hour None of these Answer: 1 minute
The force of gravity above the earth’s surface is proportional to _ and inside the earth it is proportional to __ 1/r^2, r 1/r, r r, 1/r^2 r, 1/r None of these Answer: 1/r^2, r
Which of the following waves cannot be polarized? Radio Waves Micro Waves Ultrasound X Rays Answer:Ultrasound
The fringe spacing in double slit experiment can be increased by increasing the separation of slits decreasing the distance between the slit and screen using monochromatic light of shorter wavelength than before None of these Answer: None of these
A red shirt Selectively scatters red wavelengths of visible light and absorbs the rest Selectively absorbs red wavelengths of visible light and scatters the rest None of these Answer: Selectively scatters red wavelengths of visible light and absorbs the rest
Two gasses A and B having same no of molecules are at temp 10C. A is heated at constant volume and B is heated at constant pressure and their temp rises to 20C. Increase in internal energy in A > B A < B In both gasses is same None of these Answer: In both gasses is same
The pendulums in vintage clocks usually are second pendulum torsional pendulum any pendulum can fits there Answer: second pendulum
A spring is cut into 2 equal parts and are connected in series. Effective spring constant is? (Spring constant is k). k 2k 4k None of these Answer: k
A spring is cut into 2 equal parts and are connected in parallel. Effective spring constant is? (Spring constant is k). k 2k 4k None of these Answer: 4k
A simple pendulum of length 160 m oscillates with an angular amplitude of 0.01 rad. Find the angular frequency when the bob is in momentary rest. Take g = 10 m/s2 1 Hz 4 Hz 16 Hz None of these Answer: None of these
In a case of simple pendulum, during a complete oscillation, the work done by the string is equal to: mgh mghsin@ Zero None of these Answer: Zero
If a body, moving in simple harmonic motion, makes 40 complete oscillations in 10 seconds, what is its angular frequency (in rad/s) 4π 8π 80π None of these Answer: 8π
When a body moves in un-damped simple harmonic motion, the following set of physical quantities remains constant? total energy, acceleration, amplitude kinetic energy, acceleration, angular frequency total energy, amplitude, angular frequency None of these Answer: total energy, amplitude, angular frequency
In SHM, the velocity of the particle is maximum at Mean position Extreme Position None of these Answer: Mean position
In a close pipe, fundamental frequency is 10 Hz, the second overtone will be observed at which frequency? 20 Hz 30 Hz 40 Hz 50 Hz None of these Answer: 50 Hz
In an open pipe, fundamental frequency is 10 Hz, the second overtone will be observed at which frequency? 20 Hz 30 Hz 40 Hz 50 Hz None of these Answer: 30 Hz
The speed of sound is greater in solids due to their high Density Elasticity Viscosity None of these Answer: Elasticity
The formulae for speed in relation to tension is given as: v = sqrt(F/m). What is the dimension of mass here? [M] [M/L] [M/T] [M^2] None of these Answer: [M/L]
