set 11 MCQ Questions & Answers Detailed Explanation

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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq

Questions : Which of the following statements is incorrect regarding the time period of a simple pendulum oscillating with small amplitude? The time period of the pendulum

(a) does not depend upon the amplitude

(b) is inversely proportional to $√g$

(c) is directly proportional to $√l$

(d) depends upon its mass, material and shape

The correct answers to the above question in:

Answer: (d)

T = $2π√{l/g}$

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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers

Question : 1

Which type of electromagnetic radiation is used in the remote control of a television?

a) Ultraviolet

b) Visible

c) Infra-red

d) None of these

Answer: (c)

Question : 2

An endoscope is a

a) Simple microscope

b) Type of camera

c) Narrow telescope

d) None of the above

Answer: (d)

Question : 3

Match Column-I with Column-II :

Column I (Position of the object) Column II (Magnification)
A. An object is placed at focus before a convex mirror 1. Magnification –∞
B. An object is placed at the centre of curvature before a concave mirror 2. Magnification is 0.5
C. An object is placed in focus before a concave mirror 3. Magnification is –1
D. An object is placed at the centre of curvature before a convex mirror 4. Magnification is 0.33
Select the correct answer using the codes given below the lists:

a) A – 2 ; B – 4 ; C – 1 ; D – 3

b) A – 2 ; B – 3 ; C – 4 ; D – 1

c) A – 1 ; B – 2 ; C – 3 ; D – 4

d) A – 2 ; B – 3 ; C – 1 ; D – 4

Answer: (d)

A - 2 : For u = -f,

$1/v + 1/{-f} = 1/f$

∴ v = $f/2$

and M = -$v/u$ = -$\text"f/2"/{-f}$ = 0.5

B - 3 : u = -2f. so v = -2f

M = -$v/u$ = -$({-2f}/{-2f})$ = -1

C - 1 : In concave mirror, u = –2f, v = – ∞

∴ M = -$v/u$ = – ∞,

D - 4 : In convex mirror u = – 2f

Question : 4

A glass bottle containing water tightly corked breaks when it is kep in freeze, because

a) The volume of water decreases on freezing

b) The volume of water increases on freezing

c) Bottle shrinks on freezing

d) Glass is the bad conductor of heat

Answer: (b)

Question : 5

A ray of light travels from medium I to medium II. The figure given shows the variation of sin of angles of incidence (sin i) in medium I with sin of angle of refraction (sin r) in medium II.

physics-optics-mcq-test-series
Consider the following statements
  1. Speed of light in medium I > Speed of light in medium II.
  2. Speed of light in medium I < Speed of light in medium II.
  3. Light travels from denser medium to rarer medium.
Which of the statements given above is/are correct?

a) 1 and 3

b) 1 only

c) 2 only

d) 2 and 3

Answer: (d)

Speed of light is more in rarer medium as compared to denser medium.

Question : 6

‘Pitch’ is a characteristic of sound that depends upon its

a) fequency

b) intensity

c) quality

d) None of these

Answer: (a)

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