AP ECET PHYSICS Multiple Choice Questions (MCQs)
AP ECET Physics Questions (SHM and Acoustics)
76. What is the condition for a motion to be Simple Harmonic Motion (SHM)?
- A) The motion must be uniform.
- B) The acceleration is directly proportional to displacement.
- C) The displacement is constant.
- D) The velocity is constant.
Answer: B) The acceleration is directly proportional to displacement.
77. In Simple Harmonic Motion, the restoring force is always:
- A) Inversely proportional to displacement.
- B) Zero.
- C) Directly proportional to displacement and opposite in direction.
- D) Independent of displacement.
Answer: C) Directly proportional to displacement and opposite in direction.
78. Which of the following is an example of Simple Harmonic Motion (SHM)?
- A) Earth’s revolution around the Sun.
- B) A car moving in a straight line at constant speed.
- C) A mass on a spring oscillating.
- D) A satellite orbiting Earth.
Answer: C) A mass on a spring oscillating.
79. The expression for the displacement in SHM is given by:
- A) x = A cos(ωt + φ)
- B) x = A sin(ωt + φ)
- C) x = A cos(t)
- D) x = A sin(t)
Answer: A) x = A cos(ωt + φ)
80. The time period (T) of a simple pendulum depends on:
- A) The amplitude of oscillation.
- B) The mass of the bob.
- C) The length of the pendulum.
- D) The temperature.
Answer: C) The length of the pendulum.
81. The frequency (f) of a simple harmonic oscillator is:
- A) The reciprocal of the time period.
- B) Proportional to the amplitude.
- C) Inversely proportional to the square of the displacement.
- D) Independent of the mass.
Answer: A) The reciprocal of the time period.
82. The maximum velocity of an object in SHM is:
- A) Zero.
- B) Equal to the amplitude.
- C) Aω, where A is the amplitude and ω is the angular frequency.
- D) Aω².
Answer: C) Aω, where A is the amplitude and ω is the angular frequency.
83. The phase of SHM at time t is:
- A) ωt.
- B) ωt + φ.
- C) Aωt.
- D) ωt + 2π.
Answer: B) ωt + φ.
84. The time period of a seconds pendulum is:
- A) 1 second.
- B) 2 seconds.
- C) 3 seconds.
- D) 4 seconds.
Answer: B) 2 seconds.
85. For SHM, the displacement at time t is given by:
- A) x = A cos(ωt)
- B) x = A sin(ωt)
- C) x = A cos(2πft)
- D) x = A sin(2πft)
Answer: A) x = A cos(ωt)
86. The frequency of SHM is given by:
- A) f = 1/T.
- B) f = 2πT.
- C) f = ω².
- D) f = T/2π.
Answer: A) f = 1/T.
87. In SHM, the velocity at maximum displacement is:
- A) Maximum.
- B) Zero.
- C) Half of maximum velocity.
- D) Equal to the displacement.
Answer: B) Zero.
88. The phase difference between displacement and velocity in SHM is:
- A) 0°.
- B) 90°.
- C) 180°.
- D) 360°.
Answer: B) 90°.
89. Which of the following quantities is independent of the amplitude of SHM?
- A) Velocity.
- B) Acceleration.
- C) Time period.
- D) Force.
Answer: C) Time period.
90. The period of a simple pendulum is given by the expression:
- A) T = 2π√(l/g)
- B) T = 2π√(g/l)
- C) T = 2πl/g
- D) T = 2πl/g²
Answer: A) T = 2π√(l/g)
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