MCQ Collection
ECAT Physics MCQs
Practice ECAT Physics questions with answers and explanations.
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Correct Answer: C. 2 Hz
Explanation:
Frequency is reciprocal of period.
F=1/0.5 = 2 Hz.
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Correct Answer: D. A wave whose particle oscillations are parallel to propagation
Explanation:
Longitudinal waves contain compressions and rarefactions.
Sound in air is longitudinal.
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Correct Answer: D. 2.01 s
Explanation:
Use T=2π√(L/g).
T=2π√(1/9.8)≈2.01 s.
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Correct Answer: A. Distance between successive points in the same phase
Explanation:
Wavelength may be measured between adjacent crests or compressions.
It is related to speed and frequency.
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Correct Answer: A. 20 rad/s
Explanation:
For a spring oscillator, ω=√(k/m).
√(200/0.5)=√400=20 rad/s.
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Correct Answer: B. Distance traveled by a wave disturbance per unit time
Explanation:
Wave speed depends on the medium for mechanical waves.
It equals frequency times wavelength.
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Correct Answer: C. Superposition of waves producing reinforcement or cancellation
Explanation:
When waves overlap, their displacements add.
Constructive interference reinforces, while destructive interference reduces amplitude.
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Correct Answer: D. Spreading of waves around obstacles or through openings
Explanation:
Diffraction is strongest when the opening or obstacle is comparable to wavelength.
It is a general wave property.
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Correct Answer: A. A wave pattern with fixed nodes and antinodes
Explanation:
Standing waves form from superposition of opposite traveling waves.
Nodes remain at zero displacement.
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Correct Answer: B. Frequency
Explanation:
Higher-frequency sound is perceived as higher pitch.
Pitch perception is related to but not identical with frequency.
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Correct Answer: C. Intensity and amplitude
Explanation:
Greater wave amplitude generally means greater intensity.
Perceived loudness is also frequency-dependent.
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Correct Answer: D. Observed frequency change caused by relative motion of source and observer
Explanation:
Approach raises observed frequency, while separation lowers it.
The effect occurs for sound and electromagnetic waves.
