CSS Physics MCQs 2025 (Paper I & II) Solved

Q: The energy of a simple harmonic motion depends upon:

Correct Answer: Option C (Both (A) & (B))

Q: The zeroth law of thermodynamics helps to define the term:

Correct Answer: Option A (Temperature)

Q: The light can totally pass through the polaroid only if the electric field vector vibrates _____ to the polarizing vector.

Correct Answer: Option B (Parallel)

Q: When the net wave intensity is greater than the individual intensities the interference of the waves is said to be:

Correct Answer: Option A (Constructive)

Q: The angle of incidence for which polarization is maximum is called:

Correct Answer: Option C (Polarization angle (Brewster's Angle))

Q: X-rays are electromagnetic waves of wavelengths of the order of:

Correct Answer: Option B (0.1 nm (1 Angstrom))

Q: The viscous force _____ the relative motion between the adjacent layers of a fluid in motion. Which one of the flowing fits best in the sentence?

Correct Answer: Option A (Opposes)

Q: For the successful operation of heat engine, which condition should be met?

Correct Answer: Option C (Both (A) & (B))

Q: Which quantity is not a state function?

Correct Answer: Option C (Heat)

Q: Fermi-Dirac statistics cannot be applied to:

Correct Answer: Option B (Photons)

CSS Physics 2025 MCQs – Paper I

Practice MCQs (20 Questions)

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Question 1 of 20CSS Physics-i MCQs 2025

The energy of a simple harmonic motion depends upon:

AMass

BFrequency

CBoth (A) & (B)

DNone of these

Question 2 of 20CSS Physics-i MCQs 2025

The zeroth law of thermodynamics helps to define the term:

ATemperature

BPressure

CVolume

DDensity

Question 3 of 20CSS Physics-i MCQs 2025

What is the change in the phase if a wave is reflected from a denser medium?

A3π

Cπ

D2π

Question 4 of 20CSS Physics-i MCQs 2025

The light can totally pass through the polaroid only if the electric field vector vibrates _____ to the polarizing vector.

AAntiparallel

BParallel

COpposite

DNone of these

Question 5 of 20CSS Physics-i MCQs 2025

When the net wave intensity is greater than the individual intensities the interference of the waves is said to be:

AConstructive

BDestructive

CBoth (A) & (B)

DNone of these

Question 6 of 20CSS Physics-i MCQs 2025

The angle of incidence for which polarization is maximum is called:

AScattering angle

BAngle of reflection

CPolarization angle (Brewster's Angle)

DNone of these

Question 7 of 20CSS Physics-i MCQs 2025

X-rays are electromagnetic waves of wavelengths of the order of:

A1 nm

B0.1 nm (1 Angstrom)

C2 nm

D100 nm

Question 8 of 20CSS Physics-i MCQs 2025

The viscous force _____ the relative motion between the adjacent layers of a fluid in motion. Which one of the flowing fits best in the sentence?

AOpposes

BNever affects

CFacilitates

DMay effect under certain conditions

Question 9 of 20CSS Physics-i MCQs 2025

The viscosity of a fluid in motion is 1 Poise. What will be it's viscosity (in Poise) when the fluid is at rest?

B0.5

Question 10 of 20CSS Physics-i MCQs 2025

For the successful operation of heat engine, which condition should be met?

ACyclic process

BOperated at certain temperature difference (Source & Sink)

CBoth (A) & (B)

DNone of these

Question 11 of 20CSS Physics-i MCQs 2025

Which quantity is not a state function?

AInternal energy

BPressure

CHeat

DVolume

Question 12 of 20CSS Physics-i MCQs 2025

Fermi-Dirac statistics cannot be applied to:

AElectrons

BPhotons

CFermions

DProton

Question 13 of 20CSS Physics-i MCQs 2025

In which process all the heat supplied is converted into work done?

AIsothermal

BIsochoric

CIsobaric

DIsentropic

Question 14 of 20CSS Physics-i MCQs 2025

At constant pressure and Volume, exact relation between Cp and Cv is:

ACp>Cv

BCp/Cv>1

CCp - Cv=R

DAll of these

Question 15 of 20CSS Physics-i MCQs 2025

The internal energy of an ideal gas is dependent on:

APressure

BTemperature

CVolume

DAll of these

Question 16 of 20CSS Physics-i MCQs 2025

What is not the condition for the equilibrium in three dimensional system of axis?

AFx=0

BFy=0

CFz=0

DΣF≠0

Question 17 of 20CSS Physics-i MCQs 2025

The tendency of rotation of the body along any axis is also called:

AMoment of inertia

BMoment of couple

CTorque

DForce

Question 18 of 20CSS Physics-i MCQs 2025

A simple pendulum is set into oscillations. The bob of the pendulum comes to rest after some time due to:

AFriction of air (Damping)

BIts mass

CTension in the string

DGravity

Question 19 of 20CSS Physics-i MCQs 2025

The energy of a damped oscillator:

ADecreases linearly with time

BIncreases linearly with time

CDecreases exponentially with time

DIncreases exponentially with time

Question 20 of 20CSS Physics-i MCQs 2025

The product of mass and velocity is known as:

AWork

BMoment

CImpulse

DMomentum

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CSS Physics 2025 MCQs – Paper II

Practice MCQs (20 Questions)

Question 1 of 20

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Question 1 of 20CSS Physics-ii MCQs 2025

A charge moving in a uniform static magnetic field experiences:

AA force perpendicular to magnetic field and velocity

BIncrease in momentum

CDecrease in momentum

DDecrease in velocity

Question 2 of 20CSS Physics-ii MCQs 2025

The same energy alpha particles and electrons are associated. Their De Broglie wavelengths are:

AEqual

BLonger than electrons

CSmaller than electrons

DNone of these

Question 3 of 20CSS Physics-ii MCQs 2025

The mass deficit defines:

ANuclear binding energy

BNuclear Quadrupole moment

CShape of the nucleus

DNone of these

Question 4 of 20CSS Physics-ii MCQs 2025

In nuclear physics, the magic number defines:

ANuclear binding energy

BRelatively exceptionally stable nuclei

CRadioactivity

DNone of these

Question 5 of 20CSS Physics-ii MCQs 2025

The Zeeman effect is due to the interaction of:

AExternal magnetic field and total magnetic moment of the specimen

BExternal electric field and magnetic field of specimen

CL-S coupling

DNone of these

Question 6 of 20CSS Physics-ii MCQs 2025

A photon having the same energy as an electron has a wavelength ______ than the electron's De Broglie wavelength.

AShorter

BLonger

CEqual

DNone of these

Question 7 of 20CSS Physics-ii MCQs 2025

In Lorentz transformation, motion along one axis implies that coordinates on ______ axes remain zero (invariant).

AOne axis

BTwo axes

CThree axes

DNone of these

Question 8 of 20CSS Physics-ii MCQs 2025

Gauss's law is applicable on the charges which are:

AClosely distributed in space

BSparsely distributed in space

CEnclosed by a broken surface

DEnclosed by a closed surface

Question 9 of 20CSS Physics-ii MCQs 2025

The ratio between the angular momentum (L) and orbital magnetic moment vector (μ) of the first orbital electron of Hydrogen Atoms is known as:

ATotal Magnetic Moment

BBohr Magneton

CMagnetic Moment

DNone of these

Question 10 of 20CSS Physics-ii MCQs 2025

The cyclotron is a device which is primarily used to:

AAccelerate sub-atomic particles

BTo generate neutrons

CTo generate electrons

DTo generate protons

Question 11 of 20CSS Physics-ii MCQs 2025

The rate of change of current in a coil (dI/dt) is proportional to:

AInduced emf (ε)

BVoltage (V)

CResistance (R)

DNone of these

Question 12 of 20CSS Physics-ii MCQs 2025

The charging and discharging behavior of an ideal RLC circuit is:

ASimple harmonic (Oscillatory)

BLinear

CElliptical

DNone of these

Question 13 of 20CSS Physics-ii MCQs 2025

The Lorentz force is given by:

AF = q(v*B)

Bφ = ∮A.dA

CqF_q (v*B)

DNone of these

Question 14 of 20CSS Physics-ii MCQs 2025

The Poynting vector represents:

AThe rate and direction of electromagnetic energy transferred in space

BThe amount of electromagnetic energy transferred in different forms of energy

CLoss of electromagnetic energy in a medium

DThe flow of thermal energy in a certain direction.

Question 15 of 20CSS Physics-ii MCQs 2025

The De Broglie wave-particle duality is said to be the foundation of the uncertainty principle because:

AThe velocities of the particles were very high

BThe mass could not attain the velocity of light

CThe mass increases at velocities comparable to the velocity of light

DThe uncertainty in position of the moving mass

Question 16 of 20CSS Physics-ii MCQs 2025

The relation between half-life (T_1/2) and mean life (τ) is:

AInversely proportional

BDirectly proportional

CEqual

DHalf

Question 17 of 20CSS Physics-ii MCQs 2025

The concept of mutual frame of reference (Reduced Mass) was used in:

AReduced mass correction in spectroscopy (Bohr Model)

BRadioactivity

CRelative nuclear stability

DNone of these

Question 18 of 20CSS Physics-ii MCQs 2025

The Ultraviolet catastrophe means:

AThe spectral energy concentration towards longer wavelength

BThe spectral energy concentration at the middle of the spectrum

CThe spectral energy concentration towards shorter wave side (Infinity)

DNone of these

Question 19 of 20CSS Physics-ii MCQs 2025

As per quantum physics, the observables 'E' (Energy) and ______ cannot be simultaneously measured with hundred percent accuracy.

Ap_x

Bt (Time)

DNone of these

Question 20 of 20CSS Physics-ii MCQs 2025

The theory of relativity predicts that at velocities comparable to the velocity of light, the moving mass appears to:

AIncrease

BDecrease

CRemains the same

DNone of these

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CSS Physics 2025 MCQs – Paper I

Practice MCQs (20 Questions)

The energy of a simple harmonic motion depends upon:

The zeroth law of thermodynamics helps to define the term:

What is the change in the phase if a wave is reflected from a denser medium?

The light can totally pass through the polaroid only if the electric field vector vibrates _____ to the polarizing vector.

When the net wave intensity is greater than the individual intensities the interference of the waves is said to be:

The angle of incidence for which polarization is maximum is called:

X-rays are electromagnetic waves of wavelengths of the order of:

The viscous force _____ the relative motion between the adjacent layers of a fluid in motion. Which one of the flowing fits best in the sentence?

The viscosity of a fluid in motion is 1 Poise. What will be it's viscosity (in Poise) when the fluid is at rest?

For the successful operation of heat engine, which condition should be met?

Which quantity is not a state function?

Fermi-Dirac statistics cannot be applied to:

In which process all the heat supplied is converted into work done?

At constant pressure and Volume, exact relation between Cp and Cv is:

The internal energy of an ideal gas is dependent on:

What is not the condition for the equilibrium in three dimensional system of axis?

The tendency of rotation of the body along any axis is also called:

A simple pendulum is set into oscillations. The bob of the pendulum comes to rest after some time due to:

The energy of a damped oscillator:

The product of mass and velocity is known as:

Practice Test Completed!

CSS Physics 2025 MCQs – Paper II

Practice MCQs (20 Questions)

A charge moving in a uniform static magnetic field experiences:

The same energy alpha particles and electrons are associated. Their De Broglie wavelengths are:

The mass deficit defines:

In nuclear physics, the magic number defines:

The Zeeman effect is due to the interaction of:

A photon having the same energy as an electron has a wavelength ______ than the electron's De Broglie wavelength.

In Lorentz transformation, motion along one axis implies that coordinates on ______ axes remain zero (invariant).

Gauss's law is applicable on the charges which are:

The ratio between the angular momentum (L) and orbital magnetic moment vector (μ) of the first orbital electron of Hydrogen Atoms is known as:

The cyclotron is a device which is primarily used to:

The rate of change of current in a coil (dI/dt) is proportional to:

The charging and discharging behavior of an ideal RLC circuit is:

The Lorentz force is given by:

The Poynting vector represents:

The De Broglie wave-particle duality is said to be the foundation of the uncertainty principle because:

The relation between half-life (T_1/2) and mean life (τ) is:

The concept of mutual frame of reference (Reduced Mass) was used in:

The Ultraviolet catastrophe means:

As per quantum physics, the observables 'E' (Energy) and ______ cannot be simultaneously measured with hundred percent accuracy.

The theory of relativity predicts that at velocities comparable to the velocity of light, the moving mass appears to:

Practice Test Completed!

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