CSS Physics MCQs 2020 (Paper I & II) Solved

Q: The vector product of two vectors is zero when:

Correct Answer: Option B (They are parallel or anti-parallel)

Q: A body moving with uniform speed in a circle has:

Correct Answer: Option B (Constant acceleration (towards center))

Q: The time rate of change of angular momentum is equal to:

Correct Answer: Option B (Torque)

Q: If the Earth stops rotating, the value of 'g' at the equator will:

Correct Answer: Option A (Increase)

Q: A projectile is thrown at an angle of 45° to achieve:

Correct Answer: Option B (Maximum Horizontal Range)

Q: Stokes' Law holds good for:

Correct Answer: Option C (Small spherical bodies moving slowly in a viscous fluid)

Q: For an ideal gas, the internal energy depends only on:

Correct Answer: Option C (Temperature)

Q: The area under the Pressure-Volume (PV) graph represents:

Correct Answer: Option B (Work Done)

Q: The efficiency of a diesel engine is roughly:

Correct Answer: Option B (35% to 40%)

Q: The velocity of sound in vacuum is:

Correct Answer: Option C (Zero (Sound needs a medium))

CSS Physics 2020 MCQs – Paper I

Practice MCQs (20 Questions)

Question 1 of 20

Answered: 0 / 20

Score: 0

Question 1 of 20CSS Physics-i MCQs 2020

The vector product of two vectors is zero when:

AThey are perpendicular

BThey are parallel or anti-parallel

CThey are unit vectors

DNone of these

Question 2 of 20CSS Physics-i MCQs 2020

A body moving with uniform speed in a circle has:

AConstant velocity

BConstant acceleration (towards center)

CZero acceleration

DVarying mass

Question 3 of 20CSS Physics-i MCQs 2020

The time rate of change of angular momentum is equal to:

AForce

BTorque

CPower

DEnergy

Question 4 of 20CSS Physics-i MCQs 2020

If the Earth stops rotating, the value of 'g' at the equator will:

AIncrease

BDecrease

CRemain same

DBecome zero

Question 5 of 20CSS Physics-i MCQs 2020

A projectile is thrown at an angle of 45° to achieve:

AMaximum Height

BMaximum Horizontal Range

CMinimum Time of Flight

DMaximum Speed

Question 6 of 20CSS Physics-i MCQs 2020

Stokes' Law holds good for:

ALarge bodies moving fast

BBodies moving in vacuum

CSmall spherical bodies moving slowly in a viscous fluid

DIdeal fluids only

Question 7 of 20CSS Physics-i MCQs 2020

For an ideal gas, the internal energy depends only on:

APressure

BVolume

CTemperature

DMass

Question 8 of 20CSS Physics-i MCQs 2020

The area under the Pressure-Volume (PV) graph represents:

AEntropy

BWork Done

CPower

DInternal Energy

Question 9 of 20CSS Physics-i MCQs 2020

The efficiency of a diesel engine is roughly:

A25%

B35% to 40%

C80%

D10%

Question 10 of 20CSS Physics-i MCQs 2020

The velocity of sound in vacuum is:

A332 m/s

B3 x 10^8 m/s

CZero (Sound needs a medium)

DInfinite

Question 11 of 20CSS Physics-i MCQs 2020

When a source of sound moves towards a stationary observer, the apparent frequency:

AIncreases

BDecreases

CRemains same

DBecomes zero

Question 12 of 20CSS Physics-i MCQs 2020

The phenomenon of interference is shown by:

ALongitudinal waves only

BTransverse waves only

CBoth Longitudinal and Transverse waves

DNone of these

Question 13 of 20CSS Physics-i MCQs 2020

Diffraction of light is effectively observed when the obstacle size is:

AVery large compared to wavelength

BComparable to the wavelength of light

CVery small

DInfinite

Question 14 of 20CSS Physics-i MCQs 2020

Polaroid glasses are used to reduce:

AGlare (Polarization)

BIntensity

CColor

DReflection

Question 15 of 20CSS Physics-i MCQs 2020

According to Special Theory of Relativity, the mass of a particle at speed of light becomes:

AZero

BInfinite

CConstant

DDouble

Question 16 of 20CSS Physics-i MCQs 2020

Which quantity is invariant in Special Relativity?

ATime

BLength

CMass

DSpeed of Light (c)

Question 17 of 20CSS Physics-i MCQs 2020

One Fermi is equal to:

A10^-12 m

B10^-15 m

C10^-9 m

D10^-6 m

Question 18 of 20CSS Physics-i MCQs 2020

The unit of Power is:

AJoule

BWatt (Joule/sec)

CNewton

DHorsepower-hour

Question 19 of 20CSS Physics-i MCQs 2020

Specific heat capacity is the heat required to raise the temperature of:

AWhole body by 1°C

BUnit mass by 1°C (or 1 K)

CUnit volume by 1°C

DNone of these

Question 20 of 20CSS Physics-i MCQs 2020

Angular momentum is conserved if:

ANet External Torque is zero

BNet Force is zero

CVelocity is constant

DEnergy is constant

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CSS Physics 2020 MCQs – Paper II

Practice MCQs (20 Questions)

Question 1 of 20

Answered: 0 / 20

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Question 1 of 20CSS Physics-ii MCQs 2020

The electric field inside a hollow charged metal sphere is:

AUniform

BInfinite

CZero

DVariable

Question 2 of 20CSS Physics-ii MCQs 2020

The capacitance of a parallel plate capacitor increases if:

AArea of plates is decreased

BDistance between plates is decreased

CDielectric is removed

DVoltage is increased

Question 3 of 20CSS Physics-ii MCQs 2020

Magnetic lines of force originate from:

ANorth Pole

BSouth Pole

CCenter of magnet

DInfinity

Question 4 of 20CSS Physics-ii MCQs 2020

An electron entering a magnetic field parallel to the field lines experiences:

AMaximum force

BZero force

CCircular motion

DSpin

Question 5 of 20CSS Physics-ii MCQs 2020

Root Mean Square (RMS) value of AC current is equal to:

APeak Current I_0

B0.707*I_0

C0.5*I_0

D2*I_0

Question 6 of 20CSS Physics-ii MCQs 2020

The reactance of a capacitor (X_c) is inversely proportional to:

AVoltage

BFrequency

CInductance

DResistance

Question 7 of 20CSS Physics-ii MCQs 2020

In a step-down transformer, the number of turns in the primary coil is:

AGreater than secondary coil

BLess than secondary coil

CEqual to secondary coil

DZero

Question 8 of 20CSS Physics-ii MCQs 2020

Intrinsic semiconductors are:

ADoped with impurity

BPure semiconductors

CMetals

DInsulators

Question 9 of 20CSS Physics-ii MCQs 2020

A Zener Diode is primarily used for:

ARectification

BVoltage Stabilization (Regulation)

CAmplification

DOscillation

Question 10 of 20CSS Physics-ii MCQs 2020

A Zener Diode is primarily used for:

ARectification

BVoltage Stabilization (Regulation)

CAmplification

DOscillation

Question 11 of 20CSS Physics-ii MCQs 2020

In a transistor, the base current (I_b) is usually about:

A50% of Emitter current

BLess than 5% of Emitter current

CEqual to Collector current

DZero

Question 12 of 20CSS Physics-ii MCQs 2020

The gain of an ideal Op-Amp is:

A100

B1000

CInfinite

DZero

Question 13 of 20CSS Physics-ii MCQs 2020

The threshold frequency in Photoelectric effect depends on:

AIntensity of light

BNature of the metal

CTime of exposure

DVelocity of light

Question 14 of 20CSS Physics-ii MCQs 2020

Compton effect proves that photons have:

AMomentum

BCharge

CMass

DMagnetic moment

Question 15 of 20CSS Physics-ii MCQs 2020

Wave nature of electrons was experimentally verified by:

AEinstein

BDavisson and Germer

CBohr

DRutherford

Question 16 of 20CSS Physics-ii MCQs 2020

According to Bohr's model, the angular momentum of an electron is quantized as:

Anh

Bnh / 2π

Ch / λ

Dmc^2

Question 17 of 20CSS Physics-ii MCQs 2020

Isotopes differ in:

ANumber of protons

BNumber of neutrons

CChemical properties

DAtomic number

Question 18 of 20CSS Physics-ii MCQs 2020

Radioactive decay obeys:

ALinear Law

BInverse Square Law

CExponential Law

DPower Law

Question 19 of 20CSS Physics-ii MCQs 2020

The energy source of stars (like the Sun) is:

AFission

BProton-Proton Chain (Fusion)

CChemical burning

DGravitational collapse

Question 20 of 20CSS Physics-ii MCQs 2020

A NOT gate is also known as:

ABuffer

BInverter

CConvertor

DAdder

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CSS Physics 2020 MCQs – Paper I

Practice MCQs (20 Questions)

The vector product of two vectors is zero when:

A body moving with uniform speed in a circle has:

The time rate of change of angular momentum is equal to:

If the Earth stops rotating, the value of 'g' at the equator will:

A projectile is thrown at an angle of 45° to achieve:

Stokes' Law holds good for:

For an ideal gas, the internal energy depends only on:

The area under the Pressure-Volume (PV) graph represents:

The efficiency of a diesel engine is roughly:

The velocity of sound in vacuum is:

When a source of sound moves towards a stationary observer, the apparent frequency:

The phenomenon of interference is shown by:

Diffraction of light is effectively observed when the obstacle size is:

Polaroid glasses are used to reduce:

According to Special Theory of Relativity, the mass of a particle at speed of light becomes:

Which quantity is invariant in Special Relativity?

One Fermi is equal to:

The unit of Power is:

Specific heat capacity is the heat required to raise the temperature of:

Angular momentum is conserved if:

Practice Test Completed!

CSS Physics 2020 MCQs – Paper II

Practice MCQs (20 Questions)

The electric field inside a hollow charged metal sphere is:

The capacitance of a parallel plate capacitor increases if:

Magnetic lines of force originate from:

An electron entering a magnetic field parallel to the field lines experiences:

Root Mean Square (RMS) value of AC current is equal to:

The reactance of a capacitor (X_c) is inversely proportional to:

In a step-down transformer, the number of turns in the primary coil is:

Intrinsic semiconductors are:

A Zener Diode is primarily used for:

A Zener Diode is primarily used for:

In a transistor, the base current (I_b) is usually about:

The gain of an ideal Op-Amp is:

The threshold frequency in Photoelectric effect depends on:

Compton effect proves that photons have:

Wave nature of electrons was experimentally verified by:

According to Bohr's model, the angular momentum of an electron is quantized as:

Isotopes differ in:

Radioactive decay obeys:

The energy source of stars (like the Sun) is:

A NOT gate is also known as:

Practice Test Completed!

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