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CSAT Prelims General Awareness - Physics Multiple Choice Questions and Answers | GKSERIES

(1) A hunter aims his gun at a point between the eyebrows of a monkey sitting on a branch of a tree. Just as he fires, the monkey jumps down. The bullet will:
[A] hit the monkey at the point aimed
[B] hit the monkey above the point aimed
[C] hit the monkey below at the point aimed
[D] miss the monkey altogether

Comment

Answer: Option [A]
(2) An oil tanker partially filled with oil moves forward on a level road with uniform acceleration. The free surface of oil then:
[A] remains horizontal
[B] assumes a parabolic curve
[C] is inclined to the horizontal with smaller depth at the rear end
[D] is inclined to the horizontal with larger depth at the rear end

Comment

Answer: Option [D]

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(3) A spherical body moves with a uniform angular velocity (w) around a circular path of radius r. Which one of the following statements are correct ?
[A] The body has no acceleration
[B] The body has a radial acceleration ω2r directed toward centre of path
[C] The body has a radial acceleration 2/5ω2r directed away from the centre of the path
[D] The body has an acceleration ω2 tangential to its path

Comment

Answer: Option [B]
(4) Four wires of same material and of dimensions as under are stretched by a load of same magnitude separately. Which one of them will be elongated maximum ?
[A] Wire of 1m length and 2 mm diameter
[B] Wire of 2m length and 2mm diameter
[C] Wire of 3m length and 1.5mm diameter
[D] Wire of 1m length and 1mm diameter

Comment

Answer: Option [C]
(5) Ball bearings are used in bicycles, cars, etc., because
[A] the effective area of contact between the wheel and axle is reduced
[B] the effective area of contact between the wheel and axle is increased
[C] the actual area contact between the wheel and axle is increased
[D] none of the above statements is correct

Comment

Answer: Option [A]
(6) Cloudy nights are warmer compared to clear cloudless nights, because clouds:
[A] reflect back the heat given off by earth
[B] produce heat and radiate it towards earth
[C] prevent clod waves from the sky from descending on earth
[D] absorb heat from the atmosphere and send it towards earth

Comment

Answer: Option [A]
(7) When a CD (compact disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of:
[A] reflection and transmission
[B] reflection and diffraction
[C] diffraction and transmission
[D] refraction, diffraction and transmission

Comment

Answer: Option [D]
(8) Which one of the following statements is not correct ?
[A] The velocity of sound in air is independent of pressure
[B] The velocity of sound in air decreases as the humidity increases
[C] The velocity of sound in air increases with the increase of temperature
[D] The velocity of sound in air not affected by the change in amplitude and frequency

Comment

Answer: Option [B]
(9) A fuse is used in mains electric supply as a safety device. Which one of the following statements about the fuse is correct ?
[A] It must have a low melting point
[B] It is made mainly from silver alloys
[C] It must have very high resistance
[D] It is connected in parallel with the main switch

Comment

Answer: Option [A]
(10) Electrically charged particles from space traveling at speeds of several hundred km/sec can severally harm living beings if they reach the surface of the earth. What prevents them from reaching the surface of the Earth ?
[A] The Earth’s magnetic field diverts them towards its poles
[B] Ozone layer around the Earth reflects them back to outer space
[C] Moisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth
[D] None of the statements (A), (B) and (C) given above is correct

Comment

Answer: Option [A]

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