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 : 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

The correct answers to the above question in:

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

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

Question : 1

Rainbow is caused due to

a) interference of light

b) reflection of sun light from air particles

c) dispersion of sun light from water drops

d) diffraction of sun rays from water drops

Answer: (c)

Question : 2

Colour in a colour television is produced by a combination of three basic colours, they are

a) Red, yellow and green

b) Red, green and blue

c) Red, blue and orange

d) Red, green and brown

Answer: (b)

Question : 3

Which waves cannot be transmitted through vacuum?

a) Sound

b) Heat

c) Light

d) Electromagnetic

Answer: (a)

Question : 4

An endoscope is a

a) Simple microscope

b) Type of camera

c) Narrow telescope

d) None of the above

Answer: (d)

Question : 5

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 : 6

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

Answer: (d)

T = $2π√{l/g}$

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