Physics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Physics, a fundamental topic in the field of General Knowledge. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Physics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Physics mcq questions that explore various aspects of Physics problems. Each MCQ is crafted to challenge your understanding of Physics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace General Knowledge tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Physics MCQs are your pathway to success in mastering this essential General Knowledge topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Physics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Physics knowledge to the test? Let's get started with our carefully curated MCQs!

Physics MCQs | Page 4 of 70

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Q31.
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because

a.

mercury is a metal

b.

density of mercury is greater than that of water

c.

cohesion of mercury is greater than its adhesion with glass

d.

cohesion of water is greater than its adhesion with glass

Discuss
Answer: (c).cohesion of mercury is greater than its adhesion with glass
Q32.
Suitable impurities are added to a semiconductor depending on its use. This is done in order to

a.

increase its life

b.

enable it to withstand higher voltages

c.

increase its electrical conductivity

d.

increase its electrical resistivity

Discuss
Answer: (c).increase its electrical conductivity
Q33.
Stars twinkle because

a.

the intensity of light emitted by them changes with time

b.

the distance of the stars from the earth changes with time

c.

the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time

d.

the light from the star is scattered by the dust particles and air molecules in the earth's atmosphere

Discuss
Answer: (c).the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time
Q34.
It takes much longer to cook food in the hills than in the plains, because

a.

in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time

b.

due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil

c.

in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere

d.

in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking

Discuss
Answer: (a).in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
Q35.
Moment of inertia is

a.

vector

b.

scalar

c.

phasor

d.

tensor

Discuss
Answer: (d).tensor
Q36.
Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?

a.

Rainbow

b.

Earthshine

c.

Halo

d.

Mirage

Discuss
Answer: (d).Mirage
Q37.
Inside an aeroplane, flying at a high altitude,

a.

the pressure is the same as that outside

b.

normal atmospheric pressure is maintained by the use of air pumps

c.

the pressure inside is less than the pressure outside

d.

normal humidity and partial vacuum are maintained

Discuss
Answer: (b).normal atmospheric pressure is maintained by the use of air pumps
Q38.
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?

a.

Water, iron and air

b.

Iron, air and water

c.

Air, water and iron

d.

Iron, water and air

Discuss
Answer: (c).Air, water and iron
Q39.
One thousand microns is equal to

a.

10^-3m

b.

10^-6m

c.

10^-9m

d.

10^-12m

Discuss
Answer: (a).10^-3m
Q40.
Sound travels at the fastest speed in

a.

steel

b.

water

c.

air

d.

vacuum

Discuss
Answer: (a).steel
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