CSS Physics MCQs 2018
CSS Physics 2018 MCQs – Paper I
Q1: The scalar triple product of three vectors A, B, C represents:
A: Area of a triangle
B: Volume of a parallelepiped
C: Volume of a tetrahedron
D: None of these
Q2: If the curl of a vector field is zero, the field is said to be:
A: Solenoidal
B: Conservative (Irrotational)
C: Rotational
D: Divergent
Q3: The Coriolis force is a pseudo force caused by:
A: Gravitational pull
B: Rotation of the Earth
C: Wind pressure
D: Tidal waves
Q4: The rotational kinetic energy of a hoop (ring) of mass M and radius R rolling without slipping is:
A: 1/2 MV^2
B: MV^2
C: 3/4 MV^2
D: 1/4 MV^2
Q5: A geostationary satellite orbits the Earth at a height of approximately:
A: 360 km
B: 6,400 km
C: 36,000 km
D: 400,000 km
Q6: According to the Equation of Continuity A_1V_1 = A_2V_2, if the cross-sectional area of a pipe decreases, the velocity of the fluid:
A: Increases
B: Decreases
C: Remains constant
D: Becomes zero
Q7: Terminal velocity is attained when:
A: Gravity becomes zero
B: Drag force equals the weight of the body
C: Drag force is zero
D: Acceleration is maximum
Q8: The value of Gamma γ = C_p / C_v$) for a monatomic gas is:
A: 1.40
B: 1.67
C: 1.33
D: 1.00
Q9: In a Carnot engine, heat is absorbed from the source at:
A: Constant Temperature (Isothermal expansion)
B: Constant Pressure
C: Constant Volume
D: Constant Entropy
Q10: The triple point of water is at:
A: 273.16 K
B: 0.01°C
C: 4.58 mm Hg pressure
D: All of these
Q11: Entropy has the units of:
A: Joule
B: Joule/Kelvin (J/K)
C: Kelvin/Joule
D: Watt
Q12: The speed of sound in hydrogen is _____ than in oxygen at the same temperature.
A: 4 times greater
B: Times greater
C: Same
D: 4 times less
Q13: Beats are produced due to:
A: Diffraction
B: Interference of waves with slightly different frequencies
C: Polarization
D: Refraction
Q14: Length contraction happens only in the direction:
A: Perpendicular to motion
B: Parallel to the direction of motion
C: Opposite to motion
D: Any direction
Q15: If an object moves with the speed of light, its length becomes:
A: Infinite
B: Zero
C: Double
D: Unchanged
Q16: The dimension of angular momentum is:
A: [MLT^1]
B: [ML^2T^1]
C: [ML^2T^2]
D: [M^0L^0T^0]
Q17: Which of the following is NOT a unit of pressure?
A: Torr
B: Pascal
C: Bar
D: Newton
Q18: The fringe width in Young’s Double Slit Experiment increases if:
A: Distance between slits d is increased
B: Wavelength λ is increased
C: Distance to screen D is decreased
D: Frequency is increased
Q19: Polarization of light by reflection is maximum when the angle of incidence is:
A: Brewster’s Angle
B: Critical Angle
C: 45 Degrees
D: 90 Degrees
Q20: A body executing SHM has maximum acceleration at:
A: Mean position
B: Extreme position
C: Halfway point
D: None of these
CSS Physics 2018 MCQs – Paper II
Q1: The unit of capacitance is Farad, which is equal to:
A: Coulomb/Volt
B: Joule/Coulomb
C: Volt/Ampere
D: Newton/Meter
Q2: The electric field lines of force:
A: Can cross each other
B: Never cross each other
C: Are closed loops
D: Exist inside a conductor
Q3: Biot-Savart Law is analogous to _____ in electrostatics.
A: Gauss’s Law
B: Coulomb’s Law
C: Ampere’s Law
D: Faraday’s Law
Q4: The path of a charged particle moving perpendicular to a uniform magnetic field is:
A: Straight line
B: Circular
C: Parabolic
D: Elliptical
Q5: A step-up transformer increases voltage by decreasing:
A: Power
B: Current
C: Resistance
D: Frequency
Q6: The reactance of an inductor X_L increases with
A: Increasing frequency
B: Decreasing frequency
C: Decreasing inductance
D: It remains constant
Q7: In an AC circuit, power is consumed only in:
A: Inductance
B: Capacitance
C: Resistance
D: All of them
Q8: The potential barrier for Silicon pn-junction is approximately:
A: 0.3 V
B: 0.7 V
C: 1.1 V
D: 0.1 V
Q9: An Operational Amplifier (Op-Amp 741) usually has:
A: 3 pins
B: 5 pins
C: 8 pins
D: 14 pins
Q10: The emitter of a transistor is:
A: Heavily doped
B: Lightly doped
C: Moderately doped
D: Not doped
Q11: X-rays are electromagnetic waves of:
A: Low frequency
B: Short wavelength (High energy)
C: Long wavelength
D: Same as radio waves
Q12: The concept of matter waves (Wave-Particle Duality) was proposed by:
A: Einstein
B: De Broglie
C: Bohr
D: Planck
Q13: In the Photoelectric effect, the kinetic energy of emitted electrons depends on:
A: Intensity of light
B: Frequency of incident light
C: Time of exposure
D: Distance of source
Q14: The uncertainty principle is significant only for:
A: Macroscopic bodies
B: Microscopic particles (electrons, etc.)
C: Stationary bodies
D: Charged particles only
Q15: Isotopes of an element have the same number of:
A: Neutrons
B: Nucleons
C: Protons
D: Positrons
Q16: The phenomenon of radioactivity was discovered by:
A: Henri Becquerel
B: Marie Curie
C: Rutherford
D: Chadwick
Q17: Which force is responsible for holding the nucleus together?
A: Electrostatic force
B: Gravitational force
C: Strong Nuclear Force
D: Weak Nuclear Force
Q18: Quarks are the elementary particles that make up:
A: Electrons
B: Protons and Neutrons (Hadrons)
C: Photons
D: Neutrinos
Q19: A positron is the antiparticle of:
A: Proton
B: Electron
C: Neutron
D: Alpha particle
Q20: The logic gate that gives a HIGH output only if inputs are different is:
A: AND
B: OR
C: XOR (Exclusive OR)
D: NAND