Free MCQs & Online Quiz Practice for Exams

Q: When light enters from a rare medium to a denser medium, on reflection it suffers a phase change of (Entry test 2011)

A) 180°

B) 120°

C) 90°

D) 0°

Q: The frequency of light having wavelength 3 × 10³ cm is (Entry test 2011)

A) 1×10⁶

B) 30×10⁷

C) 3×10¹⁰

D) 1×10¹³

Q: What is the relationship between intensity I and amplitude a of a wave? (Entry test 2014)

A) I·a = constant

B) I·a² = constant

C) I/a = constant

D) I/a² = constant

Q: The transverse nature of light is verified by (Entry test 2012)

A) Interference

B) Polarization

C) Diffraction

D) Dispersion

Q: In electromagnetic waves the electric and magnetic vectors are (Entry test 2012)

A) Parallel

B) Anti-parallel

C) Perpendicular

D) None of the above

Q: Which one of the following properties of electromagnetic waves does not change in vacuum? (Entry test 2012)

A) Speed

B) Wavelength

C) Frequency

D) Intensity

Q: The intensity of a wave is (Entry test 2012)

A) Directly proportional to amplitude

B) Directly proportional to amplitude²

C) Inversely proportional to amplitude

D) Inversely proportional to amplitude²

Q: The refractive index of a medium using light waves is given by (Entry test 2009)

A) n = c/v

B) n = v/c

C) n = v·c

D) n = v/c²

Q: If green light in Young’s double-slit experiment is replaced by monochromatic orange light of the same intensity then (Entry test 2009)

A) Fringe width will decrease

B) Fringe width will increase

C) Fringe width will remain the same

D) Fringes will be less intense

Q: In an open organ pipe of length L, the wavelength of the fundamental note is (Entry test 2009)

A) Equal to L

B) Equal to 2L

C) Equal to 4L

D) Equal to 3L/2

Q: If a wave can be polarized, it must be (Entry test 2009)

A) Progressive wave

B) Stationary wave

C) Longitudinal wave

D) Transverse wave

Q: When sound waves move from one medium to another, the quantity which remains unchanged is (Entry test 2010)

A) Wavelength

B) Frequency

C) Speed

D) Intensity

Q: The wave velocity in any medium depends upon (Entry test 2010)

A) Elasticity

B) Density

C) Homogeneity

D) All of the above

Q: The waves which do not require any medium for their propagation are called (Entry test 2014)

A) Mechanical waves

B) Tidal waves

C) Sound waves

D) Electromagnetic waves

Q: We can hear sound around the corner but cannot see because of (Entry test 2011)

A) Interference

B) Diffraction

C) Polarization

D) Dispersion

Q: If the amplitude of a wave at a distance r from a point source is A, then amplitude at a distance 2r is (Entry test 2005)

A) 2A

B) A

C) A/2

D) A/4

Q: A particle performs simple harmonic motion of amplitude 0.02 m and frequency 2.5 Hz. What is the maximum speed? (Entry test 2009)

A) 0.008 m/s⁻¹

B) 0.314 m/s⁻¹

C) 0.125 m/s⁻¹

D) 0.05 m/s⁻¹

Q: In a stationary wave the vibrations of particles in two adjacent segments differ in phase by (Entry test 2012)

A) 0 rad

B) π/2

C) π

D) 3π/2

Q: Two notes of frequencies f1 and f2 are sounded together and beats are formed (f1 > f2). The beat frequency will be (Entry test 2012)

A) f1+f2

B) 1/2(f1+f2)

C) f1−f2

D) 1/2(f1−f2)

Q: The fundamental frequency of an open organ pipe is greater than that of a closed organ pipe by (Entry test 2009)

A) V/4L

B) V/2L

C) 3V/2L

D) 2V/3L