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PAF Physics Tests Online (Part-2)

Q. Compton’s Effect involves scattering of:
A. Electrons by photons
B. Photons by electrons
C. Protons by neutrons
D. Atoms by light
Correct Answer: B. Photons by electrons

Q. Wave-Particle Duality applies to:
A. Only light
B. Only electrons
C. All matter
D. Macroscopic objects
Correct Answer: C. All matter

Q. The Uncertainty Principle limits precision in measuring:
A. Position and momentum
B. Energy and time
C. Both A and B
D. Charge and mass
Correct Answer: C. Both A and B

Q. Stefan-Boltzmann Law relates radiant energy to:
A. T²
B. T³
C. T⁴
D. T⁵
Correct Answer: C. T⁴

Q. Planck’s Quantum Theory states energy is:
A. Continuous
B. Proportional to frequency
C. Always conserved
D. Dependent on mass
Correct Answer: B. Proportional to frequency

Q. The Principle of Moments states that a body is balanced when:
A. Clockwise moments equal anticlockwise moments
B. All forces are equal
C. Net torque is maximum
D. Linear acceleration is zero
Correct Answer: A. Clockwise moments equal anticlockwise moments

Q. Archimedes’ Principle relates to:
A. Floating objects displacing their own weight in fluid
B. Pressure transmission in liquids
C. Elastic deformation of solids
D. Conservation of energy
Correct Answer: A. Floating objects displacing their own weight in fluid

Q. The Equation of Continuity states that:
A. Fluid speed increases with pipe diameter
B. A×v remains constant along a pipe
C. Pressure decreases with height
D. Viscosity depends on temperature
Correct Answer: B. A×v remains constant along a pipe

Q. Torricelli’s Theorem describes:
A. Fluid efflux speed under gravity
B. Pressure at different depths
C. Capillary action
D. Surface tension effects
Correct Answer: A. Fluid efflux speed under gravity

Q. Bragg’s Law is used to determine:
A. X-ray wavelengths using crystals
B. Speed of sound in metals
C. Refractive indices
D. Magnetic field strength
Correct Answer: A. X-ray wavelengths using crystals