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Physics-MCQ test-2

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

A small bulb is placed at the principle focus of a convex lens. when the bulb is switched on, the lens will produce ....... beam of light

a)

Convergent

b)

Divergent

c)

Parallel

d)

Coloured

2.

Where should an object be placed so that a real inverted image of same size is obtained by convex lens

a)

At 'f'

b)

At '2f'

c)

Infinity

d)

Between pole and focus

3.

Magnification of convex lens is

a)

positive

b)

either positive or negative

c)

negative

d)

zero

4.

The power of the lens is -4D, then its focal length is

a)

4 m

b)

-40 m

c)

-0.25 m

d)

-2.5 m

5.

In a myopic eye, the image of the object is formed

a)

behind retina

b)

on the retina

c)

on the blind spot

d)

in front of the retina

6.

The eye defect 'presbyopia' can be corrected by

a)

convex lens

b)

Bi focal lens

c)

concave lens

d)

convex mirror

7.

The path of the light is called as.........

a)

axis

b)

focal point

c)

ray of light

d)

path of light

8.

Amount of light entering in to the eye is controlled by

a)

Iris

b)

pupil

c)

eye lens

d)

none

9.

If the energy of incident and scattered beam are same, then the type of scattering is called as ............ scattering

a)

reflex

b)

in-elastic

c)

elastic

d)

bouncing

10.

Magnification of lens can be represented as M = .......

a)

h'/h

b)

-v/u

c)

h/h'

d)

either (a) or (b)

11.

The splitting of white light into colours is called

a)

dispersion

b)

refraction

c)

reflection

d)

scattering

12.

Red light is used in traffic signals because

a)

it has large wavelength

b)

less dispersion

c)

both (a) & (b)

d)

symbol of danger

13.

Convex lens produce a ..... beam of light

a)

convergent

b)

divergent

c)

dispersed

d)

scattered

14.

When a beam of light is passed through a colloidal solution, the light will be ...............

a)

reflected

b)

refracted

c)

scattered

d)

dispersed

15.

For air, the refractive index is .......

a)

0

b)

0.5

c)

2

d)

1

16.

In spherical lenses, all distance are measured from

a)

focus

b)

optic centre

c)

radius of curvature

d)

none

17.

Image formed by retina of human eye is

a)

virtual & erect

b)

virtual & inverted

c)

real & inverted

d)

real & erect

18.

Image formed by simple microscope is ......

a)

erect

b)

inverted

c)

diminished

d)

Bright

19.

The resolving power depends on

a)

diameter of lens

b)

wavelength

c)

Refractive index

d)

both (a) & (b)

20.

To view the objects on the earth surface we use......

a)

Terrestrial telescope

b)

Astronomical telescope

c)

magnifying glass

d)

microscope