CSS Physics MCQs 2021 (Paper I & II) Solved

Q: The gradient of a scalar point function is a:

Correct Answer: Option B (Vector quantity)

Q: Torque is defined as the _____ product of position vector and force.

Correct Answer: Option A (Cross (Vector))

Q: A body is in equilibrium if:

Correct Answer: Option C (Both ΣF = 0 and Στ = 0)

Q: The value of 'g' (acceleration due to gravity) is maximum at:

Correct Answer: Option B (Poles)

Q: Work done by a conservative force around a closed path is:

Correct Answer: Option C (Zero)

Q: The equation of continuity (A_1V_1 = A_2V_2) is based on the law of conservation of:

Correct Answer: Option A (Mass)

Q: Viscosity of gases _____ with rise in temperature.

Correct Answer: Option A (Increases)

Q: In an isothermal process, the internal energy of an ideal gas:

Correct Answer: Option C (Remains Constant)

Q: The change in entropy (ΔS) for a reversible adiabatic process is:

Correct Answer: Option C (Zero)

Q: The theoretical efficiency of a petrol engine is approximately:

Correct Answer: Option C (25% - 30%)

CSS Physics 2021 MCQs – Paper I

Practice MCQs (20 Questions)

Question 1 of 20

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Score: 0

Question 1 of 20CSS Physics-i MCQs 2021

The gradient of a scalar point function is a:

AScalar quantity

BVector quantity

CZero

DConstant

Question 2 of 20CSS Physics-i MCQs 2021

Torque is defined as the _____ product of position vector and force.

ACross (Vector)

BDot

CScalar

DNone of these

Question 3 of 20CSS Physics-i MCQs 2021

A body is in equilibrium if:

AΣF = 0

BΣτ = 0

CBoth ΣF = 0 and Στ = 0

DIt is moving with constant acceleration

Question 4 of 20CSS Physics-i MCQs 2021

The value of 'g' (acceleration due to gravity) is maximum at:

AEquator

BPoles

CCenter of the Earth

DTop of Mount Everest

Question 5 of 20CSS Physics-i MCQs 2021

Work done by a conservative force around a closed path is:

APositive

BNegative

CZero

DInfinite

Question 6 of 20CSS Physics-i MCQs 2021

The equation of continuity (A_1V_1 = A_2V_2) is based on the law of conservation of:

AMass

BEnergy

CMomentum

DAngular Momentum

Question 7 of 20CSS Physics-i MCQs 2021

Viscosity of gases _____ with rise in temperature.

AIncreases

BDecreases

CRemains constant

DBecomes zero

Question 8 of 20CSS Physics-i MCQs 2021

In an isothermal process, the internal energy of an ideal gas:

AIncreases

BDecreases

CRemains Constant

DBecomes zero

Question 9 of 20CSS Physics-i MCQs 2021

The change in entropy (ΔS) for a reversible adiabatic process is:

APositive

BNegative

CZero

DInfinite

Question 10 of 20CSS Physics-i MCQs 2021

The theoretical efficiency of a petrol engine is approximately:

A100%

B75%

C25% - 30%

D90%

Question 11 of 20CSS Physics-i MCQs 2021

Doppler effect is independent of:

AVelocity of source

BVelocity of observer

CDistance between source and observer

DFrequency of source

Question 12 of 20CSS Physics-i MCQs 2021

The bending of light around the corners of an obstacle is called:

AReflection

BRefraction

CDiffraction

DPolarization

Question 13 of 20CSS Physics-i MCQs 2021

In a fiber optic cable, the signal travels due to:

ARefraction

BTotal Internal Reflection

CDiffraction

DDispersion

Question 14 of 20CSS Physics-i MCQs 2021

The fringe width in interference pattern is given by:

AλD / d

Bd / λD

Cλd / D

Dλ / D

Question 15 of 20CSS Physics-i MCQs 2021

A Michelson Interferometer can be used to measure:

AMass of electron

BWavelength of light

CSpeed of sound

DViscosity

Question 16 of 20CSS Physics-i MCQs 2021

According to Einstein, the rest mass of a photon is:

A1.67 * 10^-27kg

BInfinite

CZero

D9.1 *10^-31kg

Question 17 of 20CSS Physics-i MCQs 2021

Time dilation means that a moving clock runs:

AFaster

BSlower

CAt infinite speed

DBackwards

Question 18 of 20CSS Physics-i MCQs 2021

The escape velocity from the Earth's surface is:

A9.8 km/s

B2.4 km/s

C11.2 km/s

D7.9 km/s

Question 19 of 20CSS Physics-i MCQs 2021

Unit of Magnetic Field Strength (H) is:

ATesla

BAmpere/meter

CWeber

DGauss

Question 20 of 20CSS Physics-i MCQs 2021

Which modulus of elasticity is associated with change in shape (shear)?

AYoung's Modulus

BBulk Modulus

CShear Modulus (Modulus of Rigidity)

DNone of these

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CSS Physics 2021 MCQs – Paper II

Practice MCQs (20 Questions)

Question 1 of 20

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Question 1 of 20CSS Physics-ii MCQs 2021

Gauss's Law relates electric flux with:

AElectric potential

BCharge enclosed

CElectric current

DCapacitance

Question 2 of 20CSS Physics-ii MCQs 2021

A dielectric is introduced between the plates of a capacitor to:

AIncrease capacitance

BDecrease capacitance

CShort circuit the plates

DIncrease voltage

Question 3 of 20CSS Physics-ii MCQs 2021

The force on a current-carrying conductor in a magnetic field is maximum when the angle between conductor and field is:

A0°

B45°

C90°

D180°

Question 4 of 20CSS Physics-ii MCQs 2021

Lenz's Law is a consequence of the law of conservation of:

ACharge

BMomentum

CEnergy

DMass

Question 5 of 20CSS Physics-ii MCQs 2021

The phase difference between voltage and current in a pure inductive circuit is:

A0°

B45°

C90° (Voltage leads)

D180°

Question 6 of 20CSS Physics-ii MCQs 2021

The resonant frequency of an RLC series circuit is:

AZero

B1 / (2π√LC

C2 / (π√LC

DInfinite

Question 7 of 20CSS Physics-ii MCQs 2021

In a step-up transformer, the output current is:

AGreater than input current

BLess than input current

CEqual to input current

DZero

Question 8 of 20CSS Physics-ii MCQs 2021

The majority charge carriers in P-type material are:

AElectrons

BHoles

CProtons

DNeutrons

Question 9 of 20CSS Physics-ii MCQs 2021

Which impurity is added to Germanium to form N-type semiconductor?

ATrivalent (e.g., Indium)

BPentavalent (e.g., Arsenic/Phosphorus)

CTetravalent

DNone of these

Question 10 of 20CSS Physics-ii MCQs 2021

A transistor works as an amplifier in:

AActive Region

BCut-off Region

CSaturation Region

DBreakdown Region

Question 11 of 20CSS Physics-ii MCQs 2021

The input impedance of an ideal Op-Amp is:

AZero

BLow

CInfinite

D100 Ohms

Question 12 of 20CSS Physics-ii MCQs 2021

In Photoelectric effect, the number of emitted electrons depends on:

AFrequency of light

BIntensity of light

CWork function

DWavelength

Question 13 of 20CSS Physics-ii MCQs 2021

Compton shift (Δλ) is maximum when scattering angle is:

A0°

B90°

C180°

D45°

Question 14 of 20CSS Physics-ii MCQs 2021

Pair Production occurs only when the photon interacts with:

AAn electron

BA heavy nucleus

CAnother photon

DVacuum

Question 15 of 20CSS Physics-ii MCQs 2021

The half-life of a radioactive substance is the time in which:

AAll atoms decay

BHalf of the atoms decay

C1/4th atoms decay

DNo atoms decay

Question 16 of 20CSS Physics-ii MCQs 2021

Alpha particles are essentially:

AHydrogen nuclei

BHelium nuclei (2 protons, 2 neutrons)

CElectrons

DNeutrons

Question 17 of 20CSS Physics-ii MCQs 2021

Which series of Hydrogen spectrum is in the Infrared region?

ALyman

BBalmer

CPaschen (and Brackett/Pfund)

DNone of these

Question 18 of 20CSS Physics-ii MCQs 2021

Nuclear fusion requires:

ALow temperature

BExtremely high temperature

CHeavy nuclei

DRoom temperature

Question 19 of 20CSS Physics-ii MCQs 2021

The logic gate that produces HIGH output only when both inputs are HIGH is:

AAND

BOR

CNAND

DXOR

Question 20 of 20CSS Physics-ii MCQs 2021

1 Atomic Mass Unit (amu) is equal to:

A1.66*10^-24 kg

B1.66*10^-27 kg

C9.1*10^-31 kg

D1.6*10^-19 kg

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CSS Physics 2021 MCQs – Paper I

Practice MCQs (20 Questions)

The gradient of a scalar point function is a:

Torque is defined as the _____ product of position vector and force.

A body is in equilibrium if:

The value of 'g' (acceleration due to gravity) is maximum at:

Work done by a conservative force around a closed path is:

The equation of continuity (A_1V_1 = A_2V_2) is based on the law of conservation of:

Viscosity of gases _____ with rise in temperature.

In an isothermal process, the internal energy of an ideal gas:

The change in entropy (ΔS) for a reversible adiabatic process is:

The theoretical efficiency of a petrol engine is approximately:

Doppler effect is independent of:

The bending of light around the corners of an obstacle is called:

In a fiber optic cable, the signal travels due to:

The fringe width in interference pattern is given by:

A Michelson Interferometer can be used to measure:

According to Einstein, the rest mass of a photon is:

Time dilation means that a moving clock runs:

The escape velocity from the Earth's surface is:

Unit of Magnetic Field Strength (H) is:

Which modulus of elasticity is associated with change in shape (shear)?

Practice Test Completed!

CSS Physics 2021 MCQs – Paper II

Practice MCQs (20 Questions)

Gauss's Law relates electric flux with:

A dielectric is introduced between the plates of a capacitor to:

The force on a current-carrying conductor in a magnetic field is maximum when the angle between conductor and field is:

Lenz's Law is a consequence of the law of conservation of:

The phase difference between voltage and current in a pure inductive circuit is:

The resonant frequency of an RLC series circuit is:

In a step-up transformer, the output current is:

The majority charge carriers in P-type material are:

Which impurity is added to Germanium to form N-type semiconductor?

A transistor works as an amplifier in:

The input impedance of an ideal Op-Amp is:

In Photoelectric effect, the number of emitted electrons depends on:

Compton shift (Δλ) is maximum when scattering angle is:

Pair Production occurs only when the photon interacts with:

The half-life of a radioactive substance is the time in which:

Alpha particles are essentially:

Which series of Hydrogen spectrum is in the Infrared region?

Nuclear fusion requires:

The logic gate that produces HIGH output only when both inputs are HIGH is:

1 Atomic Mass Unit (amu) is equal to:

Practice Test Completed!

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