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 24 of 65
- A. π2
- B. 8π2
- C. 4π2
- D. 2π2
Explanation: a_c = rω2 = 0.25x (2x 2π)2 a_c = 4π^2 rads-2
Correct answer: 4π2462. Which of the following vector relation is incorrect where the symbols have their usual meaning:
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The correct form of angular momentum is L=rxp
Correct answer: Option D- A. Quadrupled
- B. Halved
- C. Unchanged
- D. Doubled
Explanation: F = mv^2/r As F is directly proportional to v^2 And F is tendency to overturn in a circular motion.
Correct answer: Quadrupled- A. 1/2 radian
- B. 1 radian
- C. 1.5 radian
- D. 2 radian
Explanation: As we know, 1 radian = 57.3 degrees 85.95 / 57.3 = 1.5 radian
Correct answer: 1.5 radian- A. 3.12 m
- B. 3.14 m
- C. 3.16 m
- D. 3.18 m
Explanation: r = 50cm = 0.5m Circumference = 2πr = 2 x 3.14 x 0.5 = 3.14m
Correct answer: 3.14 m- A. Along the tangent of circular path
- B. Axis of rotation
- C. Inward the radius
- D. Outward the radius
Explanation: Angular velocity is a cross product using the right hand rule for direction.
Correct answer: Axis of rotation- A. π/2 radian/day
- B. π radian / day
- C. 2π/365 radian / day
- D. 365 radian / day
Explanation: Angular speed of Earth's annual rotation can be calculated by dividing the total angle it rotates through in one year ( 360 degrees or 2pi…
Correct answer: 2π/365 radian / day- A. rω2
- B. Constant
- C. Zero
- D. rω
Explanation: If an object is moving in a circle with constant angular velocity, the magnitude of the angular acceleration is zero.
Correct answer: Zero- A. Speed increases
- B. Angular velocity increases
- C. Time period increases
- D. Gravitational acceleration increases
Explanation: The time period (orbital period) of a satellite increases when the height of its orbit from the Earth's surface is increased.
Correct answer: Time period increases- A. Disc
- B. Ring
- C. Rod
- D. Sphere
Explanation: Correct answer is B. This option proposes that a ring rolling body has 50% translational kinetic energy and 50% rotational kinetic energy.
Correct answer: Ring- A. 0.2 kg m2
- B. 0.4 kg m2
- C. 0.6 kg m2
- D. 0.8 kg m2
Explanation: To calculate the moment of inertia (I) of a solid cylinder rotating about its axis, we use the formula: I = (1/2) × m × r2 Where: m = mass…
Correct answer: 0.4 kg m2- A. N > W
- B. N < W
- C. N = W
- D. N = 0
Explanation: Correct answer is D. It is the accurate description for the condition of weightlessness.
Correct answer: N = 0- A. 2:3
- B. 1:2
- C. 2:7
- D. 2:9
Explanation: Correct answer is B. The correct ratio of rotational kinetic energy (Krot) to translational kinetic energy (Ktrans) for a sphere rolling…
Correct answer: 1:2- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The formula for the frequency of artificial gravity is f = 1/2π√(g/R), where f represents frequency, g represents the gravitational…
Correct answer: Option D- A. 0.1 N
- B. 1 N
- C. 10 N
- D. 100N
Explanation: The centripetal force acting on the particle is 1 N. The formula for centripetal force is F = mv2/r, where F represents the centripetal…
Correct answer: 100N- A. K.E
- B. Angular momentum
- C. Rotational K.E
- D. Linear momentum
Explanation: Angular momentum is conserved when the torque acting on a system is zero.
Correct answer: Angular momentum- A. 3.5 kms-1
- B. 7 kms-1
- C. 72√kms-1
- D. 14 kms-1
Explanation: The radius of the orbit is 4 times the radius of the earth(R), the orbital speed (v′) is given by: v′ = √GMe/4R = 1/√4 × √GMe/R = 0.5×7 =…
Correct answer: 3.5 kms-1- A. Decreasing
- B. Increasing
- C. Remain same
- D. Zero
Explanation: Therefore, the correct answer is: c) Remain same: This option is correct.
Correct answer: Remain same- A. 8 N
- B. 5 N
- C. 2 N
- D. 1.5 N
Explanation: The formula for the apparent weight of an object is W' = W - ma Where W' represents the apparent weight, W represents the actual weight of…
Correct answer: 8 N- A. 2π
- B. 4π
- C. π/6
- D. π/12
Explanation: The formula for angular speed is: Angular speed = (Total angle covered) / (Time taken) d) π/12: This option is correct.
Correct answer: π/12