How does an ideal fluid always flow?
Correct answer D. Streamline
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Physics MCQs
Page 19 of Physics multiple-choice questions with answers. Tap an option to check yourself.
Page 19 of 45
To which quantity is the terminal velocity of a falling sphere directly proportional?
Correct answer D. The square of the diameter of the body
Which equation gives the terminal velocity of a sphere falling through a fluid?
Correct answer C. vt = 2gr²/9ρ
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What is the acceleration of a body once it reaches terminal velocity?
Correct answer D. 0
How can terminal velocity be described?
Correct answer B. Uniform and maximum
What are the dimensions of the coefficient of viscosity?
Correct answer D. ML⁻¹T⁻¹
A body moving along a circular path sweeps out a certain angle in a given time. What is this type of motion called?
Correct answer A. Angular motion
If the Earth-Sun distance were halved and the orbit stayed circular, how many days would a year last?
Correct answer D. 129 days
What is the apparent weight of a 10 kg body falling freely?
Correct answer C. 0
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A 2 kg body hangs from the ceiling of a lift accelerating upwards at g. What is its apparent weight inside the lift?
Correct answer A. 39.2 N
What is the minimum number of communication satellites needed to cover the whole Earth?
Correct answer B. 3
What kind of frame of reference is a satellite orbiting the Earth?
Correct answer B. A non-inertial frame
Which planet comes closest to the Earth?
Correct answer A. Venus
Who discovered the inverse square law of gravitation?
Correct answer B. Newton
A man of weight W stands in a lift that is accelerating upwards at a. What is his apparent weight?
Correct answer C. mg + ma
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A body completes two revolutions around a circular path of radius R. What is the ratio of its displacement to the distance it has travelled?
Correct answer A. 0
A stone is whirled on a string in a vertical circle. At which point is the string most likely to break?
Correct answer B. At the lowest point
A 10 kg mass is whirled at 1 m/s on the end of an inextensible string 10 m long. What is the outward force on the mass?
Correct answer D. 1 N
A motor shaft rotates steadily at 360 rev/min. Through what angle, in radians, does it turn in 1 second?
Correct answer C. 12π
What is the angular speed of the seconds hand of a watch in rad s⁻¹?
Correct answer B. π/30