Download PDF
Free download PDF of General knowledge(gk) multiple choice questions(mcqs) and answers on Physics. These general awareness quiz objective questions answers include mcqs on vector quantity, optical fiber etc.
(21)
Optical fiber works on the principle of:
[A]
refraction
[B]
scattering
[C]
interference
[D]
total internal reflection
Comment
(22)
Three identical vessels A, B and C are filled water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first ?
[A]
Vessel A
[B]
Vessel B
[C]
Vessel C
[D]
All the vessels A, B and C will be emptied simultaneously
Comment
(23)
Which one of the following is the correct sequence of the given substances in the decreasing order of their densities ?
[A]
Steel> Gold> Mercury
[B]
Steel> Mercury> Gold
[C]
Gold> Mercury> Steel
[D]
Gold> Steel> Mercury
Comment
(24)
Consider the following statements: A simple pendulum is set into oscillation. Then:
I. the acceleration is zero when the bob passes through the mean position.
II. in each cycle the bob attains a given velocity twice.
III. both acceleration and velocity of the bob are zero when it reaches its extreme position during the oscillation.
IV. the amplitude of oscillation of the simple pendulum decreases with time.
Which of these statements are correct ?
[A]
I and II
[B]
III and IV
[C]
I, II and IV
[D]
II, III and IV
Comment
(25)
A girl is swinging on a swing in sitting position. When the girl stands up, the period of swing will:
[A]
be longer
[B]
be shorter
[C]
depends on the height of the girl
[D]
not change
Comment
(26)
Who among the following anticipated Newton by declaring that all things gravitate to the earth ?
[A]
Brahmagupta
[B]
Buddhagupta
[C]
Varahamihira
[D]
Aryabhatta
Comment
(27)
Which one of the following is a vector quantity ?
[A]
Work
[B]
Energy
[C]
Pressure
[D]
Momentum
Comment
(28)
Consider the following features of newer models of motor cars:
I. Radial tyres
II. Streamlined body
III. Multipoint fuel injection
IV. Catalytic converter with exhaust
Which of these features make the new models of motor cars more fuel efficient ?
[A]
I and II
[B]
II and III
[C]
II, III and IV
[D]
I, III and IV
Comment
(29)
The working principle of a washing machine is:
[A]
dialysis
[B]
diffusion
[C]
centrifugation
[D]
reverse osmosis
Comment
(30)
If the radius of earth were to shrink by one percent, its mass remaining the same, the value of g on the earth’s surface would:
[A]
increase by 0.5%
[B]
increase by 2%
[C]
decrease by 0.5%
[D]
decrease by 2%
Comment
Please share this page
Chapters