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Lecturer Physics Test 12 Online Preparation MCQs Past Papers

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Note:-

There will be 25 multiple choice question in the test.
Answer of the questions will change randomly each time you start this test.
Practice this test at least 5 times if you want to secure High Marks.
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Test Instructions:-
Test Name	Lecturer Physics
Subject	Physics Test 12
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

PPSC Lecturer of Physics Practice Test 12

1 / 25

Planets do not twinkle because:

their distance from the earth does not change with time

they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable

they are very far away from the earth resulting in decrease in intensity of light

they emit light of a constant intensity

2 / 25

Siphon will fail to work if:

both its limbs are of unequal length

the level of the liquid in the two vessels are at the same heighta

the densities of the liquid in the two vessels are equal

the level of the liquid in the two vessels are at the same height

3 / 25

Light year is a unit of:

light

time

intensity of light

distance

4 / 25

The distance of Moon from the Earth is __________ km:

484,000

464,000

384,000

364,000

5 / 25

Pa(Pascal) is the unit for:

frequency

thrust

pressure

conductivity

6 / 25

Ozone layer protects the Earth from __________ radiations from the Sun:

ultraviolet

infrared

X-rays

microwaves

7 / 25

Light from the Sun reaches us in nearly:

4 minutes

16 minutes

2 minutes

8 minutes

8 / 25

Red + Green + Blue = ?

Maroon

Dark Blue

Black

White

9 / 25

It is easier to roll a stone up a sloping road than to lift it vertical upwards because:

work done in rolling is more than in lifting

work done in rolling a stone is less than in lifting it

work done in lifting the stone is equal to rolling it

work done in both is same but the rate of doing work is less in rolling

10 / 25

Air bubble in water shines because of the phenomenon of:

Total internal reflection

Dispersion

Refraction

Diffraction

11 / 25

What are primary colors?

color found in nature

Color in the spectrum of the white light

colors which cannot be produced

Color of the rainbow

12 / 25

Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:

the heating effect of current alone

intense sunlight at noon

hysteresis loss alone

both the heating effect of current and hysteresis loss

13 / 25

When white light passes through a prism, it splits into __________ colours:

14 / 25

Planets are kept in orbit by the?

Radiations from the Sun

Attraction among the Planets and the Sun

Gravitational pull of the Sun

Attraction among the Planets

15 / 25

If we add all the 7 colours of rainbow (red, yellow, blue, green, orange, violet and indigo), the resultant colour would be?

Black

Dark Blue

White

16 / 25

There are ........................... planets in orbit around the Sun:

17 / 25

A camera uses a __________ to form an image on a piece of film at the back:

none of these

convex lens

diverging lens

concave lens

18 / 25

Mirage is due to:

magnetic disturbances in the atmosphere

depletion of ozone layer in the atmosphere

unequal heating of different parts of the atmosphere

equal heating of different parts of the atmosphere

19 / 25

Which from the following is NOT a Renewable Energy?

Nuclear

Geothermal

Biofuels

Solar

20 / 25

The absorption of ink by blotting paper involves:

diffusion of ink through the blotting

capillary action phenomenon

viscosity of ink

siphon action

21 / 25

Short-sight defect could be corrected by a:

concave lens

none of these

convex lens

converging lens

22 / 25

Stars appears to move from east to west because:

the background of the stars moves from west to east

the earth rotates from east to west

all stars move from east to west

the earth rotates from west to east

23 / 25

Nuclear sizes are expressed in a unit named:

newton

Fermi

angstrom

tesla

24 / 25

Radiocarbon is produced in the atmosphere as a result of:

action of ultraviolet light from the sun on atmospheric oxygen

action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

collision between fast neutrons and nitrogen nuclei present in the atmosphere

lightning discharge in atmosphere

25 / 25

Sun and the other stars are virtuously huge nuclear explosion chambers producing a large amount of head and light yet, we do not hear any of the explosions because A. Heat and light are electromagnetic:

the outer space is an absolute vacuum

the process involved in the interior of the sun and the starts relate to atomic and subatomic particles and not molecules and their vibration

Sound waves get attenuated completely before they reach the earth

Heat and light are electromagnetic

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