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 20 of 65
- A. T1 < T2
- B. T1 > T2
- C. T1 = T2
- D. T1 = 2T2
Explanation: In S.H.M., the velocity of the particle also oscillates simple harmonically.
Correct answer: T1 < T2- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: This is the solution to this question ; a=-xω2 =-bx By comparing we get ; ω2= b or ω = √b As, T=2π/ω T =2π/√b
Correct answer: Option B- A. 2.5
- B. 5
- C. 10
- D. 5 √2
Explanation: The value of 5 seconds matches the initial time period when the amplitude was 2 cm.
Correct answer: 5- A. When the spring is fully compressed and when the spring is fully extended
- B. When the spring is at its rest length
- C. When the spring is halfway between its rest length and is fully extended or compressed length
- D. The acceleration is constant.
Explanation: When the spring is fully compressed or fully extended when Hook's law forces are the greatest, and this indicates that the acceleration is…
Correct answer: When the spring is fully compressed and when the spring is fully extended- A. 20/π
- B. 10/π
- C. 7/2
- D. 7/44
Explanation: Explanation is given below. The frequency of rotation of the electric motor can be calculated using the formula: f = ω/2π where f is the…
Correct answer: 7/2- A. 81 rad
- B. 245 rad
- C. 160 rad
- D. 330 rad
Explanation: 2αθ =ωf^2 - ωi^2 2(-2)θ = (0)^2 - (18)^2 - 4θ = 324 θ = 324/4 = 81 rad
Correct answer: 81 rad- A. 1:9:25
- B. 1:2:3
- C. 1:3:5
- D. 1:√3:√5
Explanation: VA : VB : VC √gr : √3gr : √5gr 1 : √3 : √5
Correct answer: 1:√3:√5- A. mg
- B. 4 mg
- C. 2mg
- D. 6 mg
Explanation: The correct answer is option A) mg, which represents the tension in the string at the lowest point of the path.
Correct answer: 6 mg- A. Mass
- B. Speed
- C. Radius
- D. Gravitational acceleration
Explanation: The banking angle of a road or track in a curve does not depend on the mass of the vehicle but is determined by the radius of the curve…
Correct answer: Mass- A. 5.6s
- B. 7.9s
- C. 9.6s
- D. 9.8s
Explanation: The time dilation effect from special relativity is given by the equation:T'= T/ √1-v2/c2Where:T' is time observed in the moving frame.T…
Correct answer: 9.6s- A. Mean position
- B. Extreme position
- C. Both A and B
- D. None
Explanation: The potential energy of simple pendulum is given by:U=mghWhere:m= massg= gravitational accelerationh= heightIn the context of a vibrating…
Correct answer: Extreme position- A. n2 times
- B. n times
- C. 2n times
- D. (2n + 1) times
Explanation: Let's denote the diameter of the thicker wire as D and the diameter of the thinner wire as d.
Correct answer: n2 times- A. Remains constant.
- B. Changes in magnitude only.
- C. Changes in direction only
- D. Changes both in magnitude and direction
Explanation: In circular motion, the direction of velocity changes at every point and it is along the tangent however, its magnitude remains constant.
Correct answer: Changes in direction only- A. Torque
- B. Angular Displacement
- C. Angular Velocity
- D. All of these
Explanation: Angular displacement, angular velocity, angular acceleration, angular momentum and torque all have direction along the axis of rotation.
Correct answer: All of these- A. 3π rad
- B. 30π rad
- C. 100π rad
- D. 3000π rad
Explanation: 3000 rpm = 3000 x 2π/60 rad/s = 100π rad/s [1 rpm = 2π/60 rad/s]
Correct answer: 100π rad- A. 60 rad/s
- B. π rad/s
- C. π/30 rad/s
- D. 2 rad/s
Explanation: The explanation is: ω = 2π/60 rad/s = π/30 rad/s
Correct answer: π/30 rad/s- A. 18 rad/s
- B. 20 rad/s
- C. 22 rad/s
- D. 24 rad/s
Explanation: The explanation is: To find the angular speed of the body, we need to relate it to the frequency of rotation.The relationship between…
Correct answer: 22 rad/s- A. 2πfC
- B. fC
- C. fC/2π
- D. fC/60
Explanation: The explanation is: C = 2πr --> r = C/2π ω = f rps = 2πf rad/s v = rω v = (C/2π) 2πf = fC
Correct answer: fC- A. R2
- B. R3/2
- C. R
- D. R1/2
Explanation: Explanation is given below. T2=(4π 2 r3)/GM T α r3/2
Correct answer: R- A. Angular displacement
- B. Angular acceleration
- C. Angular velocity
- D. All of these
Explanation: Angular displacement, angular velocity, angular acceleration, angular momentum and torque all have direction along the axis of rotation.
Correct answer: All of these