Physics MCQs For UPSC(NDA/NA) Exam
UPSC NDA/NA PHYSICS MCQ Q.1
Which one of the statements given below is not correct?
(a) a vertical plane passing through the axis of the freely suspended magnet is called the magnetic meridian
(b) a vertical plane passing through the axis of rotation of the Earth is called the geographical meridian
(c) The degree to which the magnetic field can penetrate a medium is known as the relative permeability of the medium
(d) the relative permeability is not a dimensionless quantity
Ans.(d)
UPSC NDA/NA PHYSICS MCQ Q.2
For a simple pendulum in simple harmonic motion, which of the following statements is/are correct?
1. The kinetic energy is maximum at the mean position.
2. The potential energy is maximum at the mean position.
3. Acceleration is maximum at the mean position.
Select the correct answer using the codes given below :
(a) Only 1
(b) Only 2
(c) 1 and 3
(d) 2 and 3
Ans.(a)
((Explanation :: for a simple pendulum in simple harmonic motion, the velocity at the mean position is maximum and minimum (zero) at extreme position. Due to maximum velocity the kinetic energy at mean position is maximum. At mean position, the potential energy is zero and acceleration is also zero.))
UPSC NDA/NA PHYSICS MCQ Q.3
The radius of curvature of a plane mirror
(a) is zero
(b) is infinity
(c) can be anywhere between zero and infinity
(d) none of the above
Ans.(b)
UPSC NDA/NA PHYSICS MCQ Q.4
A coin in a beaker filled with water appears raised. This phenomenon occurs because of the property of
(a) reflection of light
(b) refraction of light
(c) total internal reflection of light
(d) interference of light
Ans.(b)
UPSC NDA/NA PHYSICS MCQ Q.5
A ray of light falls on a transparent glass plane. A part of it is reflected and a part is refracted. The reflected and refracted rays can be perpendicular to each other for
(a) angle of incidence equal to 90°
(b) angle of incidence equal to zero
(c) only one angle of incidence
(d) more than one angle of incidence
Ans.(c)
UPSC NDA/NA PHYSICS MCQ Q.6
A man with a dark skin, in comparison with a man with a white skin, will experience
(a) less heat and less cold
(b) less heat and more cold
(c) more heat and less cold
(d) more heat and more cold
Ans.(c)
UPSC NDA/NA PHYSICS MCQ Q.7
Which one among the following denotes the smallest temperature
(a) 1° on the Celsius scale
(b) 1° on the Kelvin scale
(c) 1° on the Fahrenheit scale
(d) 1° on the Reaumur scale
Ans.(b)
UPSC NDA/NA PHYSICS MCQ Q.8
When a body moves with simple harmonic motion, then the phase difference between the velocity and the acceleration is
(a) 0°
(b) 90°
(c) 180°
(d) 270°
Ans.(b)
UPSC NDA/NA PHYSICS MCQ Q.9
A body is thrown vertically upwards and then falls back on the ground. Its potential energy is maximum
(a) on the ground
(b) at the maximum height
(c) during the return journey
(d) both on the ground and at the maximum height
Ans.(b)
UPSC NDA/NA PHYSICS MCQ Q.10
Which one of the following pair does not have the same dimension ?
(a) Potential energy and kinetic energy
(b) Density and specific gravity
(c) Focal length and height
(d) Gravitational force and frictional force
Ans.(b)
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