Free Waves MCQs with Answers
1,281 Waves MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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1,281 questions · page 16 of 65
- A. Motion of the body from one extreme position to the other extreme position
- B. Motion of the body from one extreme position to the same extreme position
- C. Motion of the body from one extreme position to the mean position
- D. Motion of the body from mean position back to the mean position
Explanation: VIBRATION:The complete round trip of a body about the mean position is called vibration.For Example, the motion of the bob of the pendulum…
Correct answer: Motion of the body from one extreme position to the same extreme position- A. Upward motion from mean position
- B. Right hand motion of the pendulum
- C. To and fro motion about the mean position
- D. Random movement of gas particles
Explanation: Option A : Upward motion from the mean position is not the definition of oscillatory motion.Option B : The right-hand motion of the…
Correct answer: To and fro motion about the mean position- A. Kinetic energy and potential energy
- B. Kinetic energy and velocity
- C. Velocity and acceleration
- D. Acceleration and displacement
Explanation: In SHM, acceleration is directly proportional to displacement. a = - w2 xIn SHM, the acceleration of the oscillating object is directly…
Correct answer: Acceleration and displacement- A. Acceleration is minimum when velocity is maximum
- B. acceleration is proportional to the frequency of oscillation
- C. acceleration is in opposite direction to its velocity
- D. acceleration is minimum when potential energy is maximum
Explanation: This statement is true. In SHM, when the object passes through the equilibrium position, its velocity is at its maximum, and the…
Correct answer: Acceleration is minimum when velocity is maximum- A. 0.7T
- B. T
- C. 2T
- D. 3T
Explanation: Option A is correct since the formula for a time period of a simple pendulum is T=2pi * root of l/g.
Correct answer: 0.7T- A. F is directed opposite to x
- B. F is directed along x
- C. F is always equal to x
- D. None of these
Explanation: In the equation F=−kx, where F represents the force exerted by the spring, k is the spring constant, and x is the displacement from the…
Correct answer: F is directed opposite to x- A. Right hand
- B. Upwards
- C. Rest or mean position
- D. Extreme position
Explanation: The restoring force is a force that acts to bring a body to its equilibrium position.
Correct answer: Rest or mean position- A. 0.28 m
- B. 10.8 m
- C. 6.28 m
- D. 10 m
Explanation: 10 m: This option represents the correct length for the simple pendulum.
Correct answer: 10 m- A. 1 − (x 2 / xo 2 )
- B. 1
- C. (xo 2 − x 2 )
- D. ½ (x 2)
Explanation: 𝐾𝐸 = 1 2 𝑚ω 2 (𝑥 0 2 − 𝑥 2 ) 𝑇𝑜𝑡𝑎𝑙 𝐸𝑛𝑒𝑟𝑔𝑦 = 1 2 𝑚ω 2 𝑥 0 2 Dividing the two terms gives us the ratio and the solution to…
Correct answer: 1 − (x 2 / xo 2 )- A. a = -2 x
- B. a = -(20π)x
- C. a = -(2π/10)2 x
- D. a = -(20π)2 x
Explanation: The motion of a simple harmonic oscillator can be described by the following equation:a = -ω2 * xwhere 'a' is the acceleration, 'x' is the…
Correct answer: a = -(2π/10)2 x- A. π
- B. 2 π
- C. 1/π
- D. ½ π
Explanation: T=2 π √(m/k). Where m/k is ¼. After replacing values T=2 π √(1/4) which equals to π.
Correct answer: π- A. T/4 only
- B. 3T/4
- C. 0, T/4, 3T/4 and T
- D. 0, T/2 and T
Explanation: As seen on the graph displacement is 0 on points A,C and T (at the end) which are times 0, T/2 and T.
Correct answer: 0, T/2 and T- A. Beats
- B. Overtones
- C. Resonance
- D. Stationary waves
Explanation: Resonance occurs when an external force matches the natural frequency of a system, leading to an increase in amplitude of vibrations.
Correct answer: Resonance- A. A
- B. B
- C. C
- D. D
Explanation: Potential energy and Kinetic energy interconvert into one another during simple harmonic motion, but the total energy remains constant…
Correct answer: D- A. A
- B. B
- C. C
- D. D
Explanation: In a mass-spring system, the kinetic energy is given by the formula: KE = ½ mv²In the case of a vibrating mass-spring system, the maximum…
Correct answer: B- A. Damped
- B. Critical
- C. Undamped
- D. Heavily damped
Explanation: In undamped oscillations, the amplitude remains constant over time. The absence of dissipative forces, such as friction or air resistance…
Correct answer: Undamped- A. A
- B. B
- C. C
- D. D
Explanation: In a simple harmonic motion, the velocity of the particle at any point can be expressed as: v = ω√(xo² - x²)Where,v is the velocity of the…
Correct answer: A- A. π
- B. π/2
- C. -π/2
- D. -π
Explanation: In simple harmonic motion (S.H.M.), the displacement x is given by x = a sin(ωt).
Correct answer: π/2- A. f/2
- B. f
- C. 2f
- D. 4f
Explanation: K.E=½ mw2(x02-x2) = ½ mw2 (x02- x02sin2 wt) =½ mw2 x02(1-sin2 wt) =½ mw2 x02cos2 wt =½ mw2 x02(1+cos2 wt/2 ) =¼ mw2 x02 +¼ mw2 x02cos2wt…
Correct answer: 2f- A. 16s
- B. 12s
- C. 8s
- D. 4s
Explanation: The formula for the period of a simple pendulum is: T = 2π √(L/g) Where: T is the period of the pendulum, L is the length of the pendulum…
Correct answer: 4s