Test : Physics - 6 - NDA MCQ

# Test : Physics - 6 - NDA MCQ

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## 20 Questions MCQ Test NDA (National Defence Academy) Mock Test Series 2024 - Test : Physics - 6

Test : Physics - 6 for NDA 2024 is part of NDA (National Defence Academy) Mock Test Series 2024 preparation. The Test : Physics - 6 questions and answers have been prepared according to the NDA exam syllabus.The Test : Physics - 6 MCQs are made for NDA 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test : Physics - 6 below.
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Test : Physics - 6 - Question 1

### Which of the following physical quantities is a scalar quantity?

Detailed Solution for Test : Physics - 6 - Question 1

Power is the ratio of two scalar quatities, and is thus scalar quatities.

Test : Physics - 6 - Question 2

### The unit of which physical quantity is not pascal?

Detailed Solution for Test : Physics - 6 - Question 2

Pascal is not unit of Moment of Inertia. Moment of inertia may be expressed in units of kilogram metre squared (kg. m2) in SI units.

Test : Physics - 6 - Question 3

### Atmospheric pressure is measured by __________.

Detailed Solution for Test : Physics - 6 - Question 3

Atmospheric pressure is measured by Barometer.

Test : Physics - 6 - Question 4

Electric motors operating at low voltages tend to burn out because-

Detailed Solution for Test : Physics - 6 - Question 4

Electric motors operating at low voltage tend to burn out because they draw more current which is inversely proportional to the voltage.

Test : Physics - 6 - Question 5

What is the SI unit of atmospheric pressure?

Detailed Solution for Test : Physics - 6 - Question 5

The Pascal is SI unit of pressure.

Test : Physics - 6 - Question 6

The absorption of ink by blotting paper involves

Detailed Solution for Test : Physics - 6 - Question 6

The absorption of ink by blotting paper involves Capillary action phenomenon.

Test : Physics - 6 - Question 7

Who invented Neon Lamp?

Detailed Solution for Test : Physics - 6 - Question 7

Georges Claude invented Neon Lamp.

Test : Physics - 6 - Question 8

The strongest force in nature is -

Detailed Solution for Test : Physics - 6 - Question 8

Strong nuclear force is the strongest force. It is present inside the atom responsible for binding the protons and neutrons and also inside the proton and neutron in binding up the quarks.

Test : Physics - 6 - Question 9

In nuclear reactor, heavy water is used as -

Detailed Solution for Test : Physics - 6 - Question 9

Heavy water is basically used as a moderator in nuclear reactors to slow down the neutrons so that they are captured and become effective to bring about the fission reaction

Test : Physics - 6 - Question 10

Which one of the following Indian scientists was elected as a fellow of the Royal Society of London for his contribution in the field of Plant Physiology and Physics?

Detailed Solution for Test : Physics - 6 - Question 10

Jagdish Chandra Bose was elected as a fellow of the Royal Society of London for his contribution in the field of Plant Physiology and Physics.

Test : Physics - 6 - Question 11

Assertion (A): Steam is more harmful for human body than the boiling water in case of burn.

Reason (R) : Boiling water contains more heat than steam.

Detailed Solution for Test : Physics - 6 - Question 11

Steam burns are more serious than burns from boiling water even though both are at 100°C because when steam condenses it give up very high heat energy i.e. additional 22.6 × 〖10〗^6 joule of heat (latent that of vapourisation) compared to boiling water.

Test : Physics - 6 - Question 12

Why is it difficult to see through for?

Detailed Solution for Test : Physics - 6 - Question 12

The rays of light are scattered by the fog droplets due to which it become difficult to see through fog.

Test : Physics - 6 - Question 13

The density of water varies with temperature which helps the aquatic animals to live in cold water. At what temperature is the density of water maximum?

Detailed Solution for Test : Physics - 6 - Question 13

Density of water is maximum at 4°C.

Test : Physics - 6 - Question 14

Who gave the first evidence of the big-bang theory?

Detailed Solution for Test : Physics - 6 - Question 14

Edwin Hubble gave the first evidence of the big-bang theory.

Test : Physics - 6 - Question 15

A ray of light is incident on a plane mirror at an angle 30° with the normal at the point of incidence. The ray will be deviated from its incidence direction by what angle?

Detailed Solution for Test : Physics - 6 - Question 15

The given situation can be shown as

By la w o f reflection , angle o f incidence i is equ al to angle o f r e fle c tio n r Total deviation of ray = 30° 4- 30° = 60°

Test : Physics - 6 - Question 16

What would be the best choice for window material to keep the outside heat away?

Detailed Solution for Test : Physics - 6 - Question 16

To keep the outside heat away, windows of double-pane glass with air in between is the best choice because air is the bad conductor of heat.

Test : Physics - 6 - Question 17

Bar is a unit of which one of the following?

Detailed Solution for Test : Physics - 6 - Question 17

To keep the outside heat away, windows of double-pane glass with air in between is the best choice because air is the bad conductor of heat.

Test : Physics - 6 - Question 18

On which one of the following conservative laws, does a rocket work?

Detailed Solution for Test : Physics - 6 - Question 18

Rocket works on the principle of conservation of linear momentum.

Test : Physics - 6 - Question 19

Assertion (A) : In a pressure cooker food is cooked above boiling point.

Reason (R) : Boiling point of water increases as the pressure increases.

Detailed Solution for Test : Physics - 6 - Question 19

In a pressure cooker while cooking pressure increases due to which boiling point of water also increases as P ∝ T.

Test : Physics - 6 - Question 20

The momentum of a toy bus of 0.01 kg moving with a velocity of 5m/s is

Detailed Solution for Test : Physics - 6 - Question 20

we know that momentum (p) = mv = .01 × 5 = .05kgm/s

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