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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- A. Constant
- B. Proportional to displacement
- C. Proportional to square of displacement
- D. Independent of displacement
Explanation: Showing acceleration ∝-displacement.(toward mean position)
Correct answer: Proportional to displacement- A. Twice the frequency
- B. Half the period
- C. Half the frequency
- D. Twice the period
Explanation: The displacement-time graph of an oscillating particle can be used to find important characteristics of its motion, such as amplitude…
Correct answer: Half the period- A. 2 Hz
- B. 20 Hz
- C. 4 Hz
- D. 40 Hz
Explanation: Vibrations = 100Time = 5 sFrequency = vibrations/time= 100/5= 20 HzHence, option B is the correct
Correct answer: 20 Hz- A. Option A
- B. Option B
- C. Option C
- D. None
Explanation: Kinetic Energy (K.E.): The kinetic energy of a body undergoing SHM varies sinusoidally with time.
Correct answer: Option A- A. 3.973 m
- B. 5.123 m
- C. 7.111 m
- D. 9.231 m
Explanation: This option uses the correct application of the formula T = 2π√(l/g) and solves for l using the given values, resulting in the length of…
Correct answer: 3.973 m- A. K and L
- B. K and M
- C. K, L and M
- D. L and M
Explanation: Option B is the correct choice because it accurately describes the energy conditions in simple harmonic motion.
Correct answer: K and M- A. 2√6 seconds
- B. 1 second
- C. 2 seconds
- D. 6√2 seconds
Explanation: The time period of a simple pendulum is given by the formula: T = 2π√(L/g)On the Moon, gravity is 1/6 of Earth's, so the pendulum's time…
Correct answer: 2√6 seconds- A. 0.4 Nm-2
- B. 40 Nm-1
- C. 400 Nm-1
- D. 4 Nm-1
Explanation: When a spring is stretched/compressed by the application of a force, the relationship between the magnitude of the force applied and the…
Correct answer: 4 Nm-1- A. The body is at mean position
- B. The body is at extreme position from the mean
- C. The body is exactly half way down between mean and extreme position
- D. The body is somewhere between mean and extreme position
Explanation: In simple harmonic motion, there is a continuous interchange of kinetic energy and potential energy.
Correct answer: The body is at mean position- A. Directly proportional ; maximum position
- B. Inversely proportional ; maximum position
- C. Directly proportional ; mean position
- D. Directly proportional ; minimum position
Explanation: For a simple harmonic motion, the acceleration of the body is directly proportional to the displacement and always directed towards the…
Correct answer: Directly proportional ; mean position- A. Undamped
- B. Underdamped
- C. Critically damped
- D. Overdamped
Explanation: In the context of the scenario described, option b) "Underdamped" is the correct answer, as it accurately characterizes the behavior of…
Correct answer: Underdamped272. The force applied on a unit area to produce any change in the volume or length of a body is called:
- A. Strain
- B. Stress
- C. Elasticity
- D. Equilibrium
Explanation: In physics, stress is defined as the force applied per unit area to a material.
Correct answer: Stress- A. The spring with force constant k1 and the block of mass m1
- B. The spring with force constant k1 and the block of mass m2
- C. The spring with force constant k2 and the block of mass m1
- D. The spring with force constant k2 and the block of mass m2
- E. All the combinations above would give the same period
Explanation: The period of the spring-block simple harmonic oscillator is given by the equation T =2π√m/k so, to make T as small as possible, we want m…
Correct answer: The spring with force constant k1 and the block of mass m2- A. 4.567
- B. 3.416
- C. 2.315
- D. 1.325
- E. 0.628
Explanation: This is the solution to this question: The time period of vibration can be calculated using the formula: T = 2π * √(m/k) where T is the…
Correct answer: 0.628- A. Remain the same
- B. Decrease
- C. First decrease then increase
- D. Increase
Explanation: The time period T of a simple pendulum is given by the formula T = 2π√(l/g), where l is the length of the pendulum and g is the…
Correct answer: Increase- A. 3.973 m
- B. 5.123 m
- C. 7.111 m
- D. 9.231 m
- E. 12.141 m
Explanation: To find the length of the pendulum, use the formula for the time period of a simple pendulum: T = 2π√(l/g).
Correct answer: 3.973 m- A. 1:√2
- B. 1:2
- C. 2:1
- D. √2:1
Explanation: This is the correct answer. The time period of a spring-mass system is given by T = 2π√(m/k), where T is the time period, m is the mass…
Correct answer: 1:√2- A. Increasing the length of the pendulum
- B. Decreasing the length of the pendulum
- C. Using a heavier bob
- D. Using a lighter bob
Explanation: The 'time of one vibration' of the simple pendulum can be decreased by decreasing the pendulum length.
Correct answer: Decreasing the length of the pendulum- A. Murree
- B. Karachi
- C. K-2
- D. Peshawar
Explanation: At higher altitudes, the value of g decreases slightly compared to its value at sea level.
Correct answer: K-2- A. X = a(sin2 ω t + cos2 ω t)
- B. X = a(sin ω t cos2 ω t)
- C. X = a sin ω t
- D. X = a2 sin (sin ω t)
Explanation: X = a sin ω t is the standard equation of SHM, in which a corresponds to amplitude.
Correct answer: X = a sin ω t