PAF Initial Test Preparation | Physics Mcqs Ep#1

Get ready for your PAF Initial Test with this must-try Physics MCQs post by EduSmart! This set of MCQs is perfect for all PAF vacancies: GDP, CAE, LOG, AD, ADMIN, SSC, AIRMAN, and FMA. Every question is selected based on the PAF exam, so you are fully prepared for your test.

At the end of this post, you will find a Mock Test that you can try out. So, this is a complete package for your preparation.

Start your preparation for acing your PAF Initial Test with EduSmart for the best coaching!

PAF Physics Important Mcqs Part-1

Section-1:

What is the unit of force?
A) Newton
B) Joule
C) Watt
D) Pascal
Correct Answer: A) Newton
Explanation:
The unit of force is the Newton (N), defined as the force required to accelerate a 1 kg mass by 1 m/s².

What is the formula for velocity?
A) v = s / t
B) v = t / s
C) v = s * t
D) v = s + t
Correct Answer: A) v = s / t
Explanation:
Velocity (v) is displacement (s) divided by time (t).

Which of the following is a vector quantity?
A) Speed
B) Distance
C) Velocity
D) Time
Correct Answer: C) Velocity
Explanation:
Velocity is a vector quantity because it has both magnitude and direction, unlike speed which only has magnitude.

What is the formula for acceleration?
A) a = (v – u) / t
B) a = (u – v) / t
C) a = v + u
D) a = v * t
Correct Answer: A) a = (v – u) / t
Explanation:
Acceleration (a) was the velocity in two dimensions (v – v) was the velocity in time (t).

What is the SI unit of work?
A) Newton
B) Joule
C) Watt
D) Tesla
Correct Answer: B) Joule
Explanation:
Work is measured in Joules (J), which is defined as the work done when a force of 1 Newton acts over a distance of 1 meter.

Section-2:

If the force acting on an object is doubled, what happens to the acceleration?
A) It is doubled
B) It is halved
C) It remains the same
D) It becomes four times
Correct Answer: A) It is doubled
Explanation:
According to Newton’s second law, if the force is doubled, the acceleration will also double, assuming the mass remains constant.

Which of the following is the correct formula for the potential energy of an object?
A) PE = mv²
B) PE = 1/2 mv²
C) PE = mgh
D) PE = mv
Correct Answer: C) PE = mgh
Explanation:
PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height.

What does the law of conservation of energy state?
A) Energy can be created or destroyed
B) Energy can only be transferred
C) Energy cannot be created or destroyed
D) Energy is stored in the system
Correct Answer: C) Energy cannot be created or destroyed
Explanation:
The law of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.

What is the formula for kinetic energy?
A) KE = 1/2 mv²
B) KE = mv²
C) KE = mgh
D) KE = 1/2 m²v
Correct Answer: A) KE = 1/2 mv²
Explanation:
The kinetic energy (KE) of an object is given by KE = 1/2 mv², where m is mass and v is velocity.

What is the unit of power?
A) Joule
B) Watt
C) Newton
D) Pascal
Correct Answer: B) Watt
Explanation:
The unit of power is Watt (W), defined as the rate at which work is done (1 Watt = 1 Joule per second).

Section-3:

What is the formula for the gravitational force between two objects?
A) F = ma
B) F = Gm₁m₂ / r²
C) F = mv² / r
D) F = mg
Correct Answer: B) F = Gm₁m₂ / r²
Explanation:
The gravitational force (F) between two masses m₁ and m₂ is given by F = Gm₁m₂ / r².

What does Hooke’s law describe?
A) The relationship between force and velocity
B) The relationship between force and distance
C) The relationship between force and extension
D) The relationship between energy and work
Correct Answer: C) The relationship between force and extension
Explanation:
Hooke’s law states that the force (F) required to extend or compress a spring is proportional to the displacement (x), i.e., F = kx, where k is the spring constant.

What is the unit of charge?
A) Coulomb
B) Ampere
C) Volt
D) Ohm
Correct Answer: A) Coulomb
Explanation:
The unit of charge is the Coulomb (C), which is the amount of charge transported by a current of 1 ampere in 1 second.

What is the formula for Ohm’s law?
A) V = IR
B) V = I²R
C) V = I / R
D) V = R / I
Correct Answer: A) V = IR
Explanation:
Ohm’s law states that the voltage (V) across a conductor is directly proportional to the current (I) and resistance (R). V = IR.

What is the formula for the period of a pendulum?
A) T = 2π√(l / g)
B) T = 2π√(g / l)
C) T = 2πl / g
D) T = π√(l / g)
Correct Answer: A) T = 2π√(l / g)
Explanation:
The period (T) of a simple pendulum is given by T = 2π√(l / g), where l is the length of the pendulum and g is the acceleration due to gravity.

Section-4:

Which of the following is the correct SI unit of electric current?
A) Coulomb
B) Ampere
C) Volt
D) Watt
Correct Answer: B) Ampere
Explanation:
The SI unit of electric current is the Ampere (A).

What does the Doppler effect describe?
A) Change in frequency due to motion
B) Change in velocity due to motion
C) Change in acceleration due to motion
D) Change in force due to motion
Correct Answer: A) Change in frequency due to motion
Explanation:
The Doppler effect refers to the change in frequency (or wavelength) of a wave as the source and observer move relative to each other.

Which of the following materials is a good conductor of electricity?
A) Rubber
B) Wood
C) Copper
D) Plastic
Correct Answer: C) Copper
Explanation:
Copper is an excellent conductor of electricity due to its low resistance.

What is the unit of electrical resistance?
A) Joule
B) Watt
C) Ohm
D) Ampere
Correct Answer: C) Ohm
Explanation:
The unit of electrical resistance is the Ohm (Ω), defined as the resistance through which a current of one ampere produces a voltage of one volt.

Which type of lens is used to correct hyperopia (farsightedness)?
A) Concave lens
B) Convex lens
C) Cylindrical lens
D) Bifocal lens
Correct Answer: B) Convex lens
Explanation:
A convex lens is used to correct hyperopia by converging light before it reaches the eye.

PAF Initial Test Preparation Physics Mock Test-1

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