Physics MCQS

351. Two blocks ‘A’ and ‘B’ having mass 3 kg and 4 kg are raised to the same height from the earth’s surface. The ratio of gravitational potential of ‘A’ to that of ‘B’ is?
A. 3/4
B. 2/4
C. 1/1
D. 4/4

352. On a level road, a car weighing 1500 kg is pulled by an engine at a constant speed of 5 m/s. If there is 500 N of friction. What kind of power does the engine produce?
A. 5.0 kW
B. 7.5 kW
C. 10 kW
D. 2.5 kW

353. The value of Gravitational Constant ‘G’ depends upon?
A. The masses of the bodies
B. The size of the bodies
C. Density of the planet
D. None of these

354. The value of the acceleration due to gravity ‘g’ on earth depends upon?
A. The mass of the earth
B. The average radius of the earth
C. The average density of the earth
D. All of the above quantities

355. A centripetal force provided by keeps an earth satellite moving in its orbit.
A. The engine’s burning of fuel
B. The ejection of hot gases from its exhaust
C. The gravitational attraction of the sun
D. The gravitational attraction of the earth

356. The body’s escape velocity from the surface of the earth is 11.2 km/sec. The body’s escape velocity for a planet with a mass and radius twice that of Earth will be?
A. 44.8 km/sec
B. 22.4 km/sec
C. 11.2 km/sec
D. 20.8 km/sec

357. Choose the wrong statement, the escape velocity of a body from a planet depends upon:
A. The mass of the body
B. The mass of the planet
C. The average radius of the planet
D. The density of the planet

358. When a beam of light is used to determine the position of an object, the greatest accuracy is obtained if the light?
(A) Is polarized
B) Has shorter wavelength
(C) Has long wavelength
(D) Has low intensity

359. Relative to the original photon, the photons that emerge from a collision with an electron have?
(A) Longer wavelength
(B) More momentum
(C) More energy
D) Higher frequency

360. Modern physical theories indicate that?
A) All particles exhibit wave behavior
(B) Only moving particles exhibit wave behavior
(C) Only charged particles have wave behavior
(D) Only uncharged particles have wave behavior