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Physics - MOST IMPORTANT Executive Previous Year Questions

Practice real questions from previous year exams of Executive.

📘 Current Electricity📚 Heating Effect of Electric Current

Q1

The fuse in an electrical circuit breaks the circuit open when a high current flows. Which of the following is responsible for this?

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A.

Leaking of electrons in the circuit

B.

Leaking of potential difference in the circuit

C.

Heating effect of current

D.

Cooling effect of current

📘 Force and Motion📚 Inertia and its types

Q2

If the mass of a body is increased, the inertia:

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

becomes zero

B.

remains the same

C.

decreases

D.

increases

📘 Sound📚 Misc

Q3

Which of the following statements is NOT correct?

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

Pressure waves create vibration in the molecules of the air.

B.

A vibrating body does not produce sound.

C.

When a body vibrates, it creates pressure waves.

D.

A vibrating body produces sound.

📘 Natural Phenomenon📚 Dispersion of Light through a Prism

Q4

White light is dispersed into its seven colour components by a prism. Which of the following is the correct explanation for this?

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A.

The incident white light is reflected.

B.

There is no bending of light.

C.

Different colours bend by different angles.

D.

Different colours bend by the same angle.

📘 Fluid Mechanics📚 Archimedes Principle and its applications

Q5

An iron nail sinks in water while an iron plate of same mass floats. Which of the following statements is a correct explanation?

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A.

The density of the nail is less than that of the plate.

B.

The weight of the nail is higher than that of the plate.

C.

The phenomenon is independent of the densities of the nail and the plate.

D.

The surface area of the plate is larger than the surface area of the nail.

📘 Mechanical Properties of Solid📚 Misc

Q6

Which of the following statements correctly justify that sulphur is a non-metal, while aluminum is a metal?

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A.

Sulphur is malleable and ductile, whereas aluminium is a good conductor of heat.

B.

Aluminium is malleable and ductile, whereas sulphur is brittle.

C.

Both aluminium and sulphur are lustrous, but only aluminium conducts electricity.

D.

Aluminium is a good conductor of heat and electricity, while sulphur is only a good conductor of heat.

📘 Electrostatics📚 Electric Charge and its Measurement

Q7

A device used to test whether an object is carrying a charge or not is known as ________.

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A.

Stethoscope

B.

Coulomb device

C.

Electrostatic device

D.

Electroscope

📘 Gravitation📚 Newton's Law of Gravitation

Q8

According to the law of gravitation:

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A.

Only the earth attracts the moon towards itself

B.

The earth and the moon both attract each other

C.

Only the moon attracts the earth towards itself

D.

There is no force of attraction between them

📘 Sound📚 Misc

Q9

In humans, the sound is produced by the ______.

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A.

Epiglottis

B.

Larynx

C.

Trachea

D.

Vallecula

📘 Units and Dimensions📚 Conversion from one unit to other

Q10

The common unit of measuring volume is litre (L), such that 1 L is equal to:

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A.

1 m

B.

1 cm

C.

1 mm

D.

1 dm

📘 Human Eye📚 Defects in Eyes- Presbyopia

Q11

The decrease in the power of accommodation of the eye with age is termed as:

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A.

Presbyopia

B.

Hypermetropia

C.

Myopia

D.

Astigmatism

📘 Atomic and Nuclear Physics📚 Atoms- Electrons, Protons, Neutrons

Q12

The nuclei of which of the following elements does [not] have a neutron?

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A.

Hydrogen (Protium)

B.

Carbon

C.

Oxygen

D.

Nitrogen

📘 Force and Motion📚 Physical Quantities related to Motion- acceleration, displacement, etc.

Q13

What is the average velocity of a car that moved 80 km in 2 hours?

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A.

10 km/h

B.

20 km/h

C.

30 km/h

D.

40 km/h

📘 Force and Motion📚 Newton's Third Law of Motion

Q14

Which of the following of Newton’s laws explains the recoiling of a gun when a bullet is fired?

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A.

Law of gravitation

B.

Third law of motion

C.

First law of motion

D.

Second law of motion

📘 Light and Optics📚 Use of Spherical Mirrors

Q15

Which type of mirrors are used by dentists to see large images of patient's teeth?

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A.

Plane

B.

Convex

C.

Diverging

D.

Converging

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