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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341. Reducing mass M of a suspending body to one fourth will change the frequency of oscillation to:
- A. One fourth
- B. Double
- C. Quardruple
- D. Half
Explanation: The relationship between the frequency and the mass of an object undergoing simple harmonic motion can be expressed as: f = 1 / √M When…
Correct answer: Double- A. K.E is maximum at extreme position
- B. P.E is maximum at extreme position
- C. Both K.E and P.E are minimum at mean position
- D. P.E is maximum at mean position
Explanation: In simple harmonic motion, the formula for kinetic energy and potential energy are as below: K.E=1/2mv2(a2-x2) and U=1/2mv2x2Step1…
Correct answer: P.E is maximum at extreme position- A. T
- B. 3T
- C. T/3
- D. 2T
Explanation: The time period of a simple pendulum is given by:T=2π√l/gAccording to the above formula, the time period of a simple pendulum is…
Correct answer: T- A. 1/2 (amplitude)
- B. 1/√2 (amplitude)
- C. 1/√3 (amplitude)
- D. None
Explanation: In a simple harmonic oscillator, the kinetic energy (KE) is equal to half the potential energy (PE) at any given point.
Correct answer: 1/√3 (amplitude)- A. 1:2
- B. 1:4
- C. 1:14
- D. Infinity
Explanation: For a simple pendulum, the ratio of the amplitude to the displacement after a given time is 1:2.
Correct answer: 1:2- A. The motion of the earth around the sun
- B. The motion of a mass attached with a string on a vertical circle
- C. The motion of a minutes hand in the clock
- D. The motion of a spinning top
Explanation: The motion of earth around the sun is the best example of uniform circular motion. Therefore, option A is the only correct answer.
Correct answer: The motion of the earth around the sun- A. 5 m/s
- B. 10 m/s
- C. 15 m/s
- D. 20 m/s
Explanation: Drop in P.E = Gain in K.Emg (2-0.75) = 1 mv²v = √2g (1.25) = 5 m/s
Correct answer: 5 m/s- A. mg cosθ
- B. mg tanθ
- C. mg2 sinθ
- D. mg sinθ
Explanation: The force responsible for the simple harmonic motion of a simple pendulum is the component of gravitational force that acts along the arc…
Correct answer: mg sinθ- A. E =-2kx
- B. E=0.5(kx^2)
- C. E= -kx²
- D. E = kx
Explanation: The total energy E of a body at any instant, executing simple harmonic motion, is given by E=0.5(kx^2).
Correct answer: E=0.5(kx^2)- A. Increases 2 times
- B. Decreases 4 times
- C. Remains the same
- D. Increases 4 times
- E. Decreases 2 times
Explanation: The frequency of a simple pendulum is determined by the formula f = 1/2π√(g/L), which shows that the frequency is inversely proportional…
Correct answer: Decreases 2 times- A. 2m
- B. 1/2m
- C. 4 m
- D. 1m
Explanation: In the figure, the wave reaches a maximum displacement of 1 meter above and below the equilibrium line.
Correct answer: 1m- A. 1 Hz
- B. 2 Hz
- C. 3 Hz
- D. 4 Hz
Explanation: Correct. Here's the calculation:Relationship between frequency and period:Frequency (f) = 1 / Period (T)Where:f = frequency (Hz)T = period…
Correct answer: 2 Hz- A. Heating
- B. Resonance
- C. Reverberation
- D. Damping
Explanation: Option B is correct. Resonance describes the phenomenon of increased amplitude that occurs when the frequency of a periodically applied…
Correct answer: Resonance- A. Independent of 'x'
- B. Proportional to 'x'
- C. Proportional to 'x2'
- D. Proportional to 'x-2'
- E. Proportional to '√x'
Explanation: The explanation is given below:.The total energy of a block executing simple harmonic motion is the sum of its kinetic energy and…
Correct answer: Proportional to 'x2'- A. Higher
- B. Lower
- C. Intermediate
- D. Zero
Explanation: For stiffer springs, the spring constant has a larger value. Because for a stiffer spring, more force will be required to produce an…
Correct answer: Higher- A. 2f
- B. f/2
- C. f
- D. None of these
Explanation: Frequency is defined as the number of oscillations or the number of wiggles per unit time.
Correct answer: 2f- A. 1 : √2
- B. 1 : 2
- C. √2 : 1
- D. 2 : 1
- E. 2 : √2
Explanation: First mass = 0.5 kgSecond mass = 1 kgFirst stretch = 5 cmSecond stretch = 10 cm
Correct answer: 1 : √2- A. Murree
- B. Karachi
- C. K-2
- D. Peshawar
Explanation: The motion of a simple pendulum depends on the acceleration due to gravity, which in turn depends on the distance from the center of the…
Correct answer: Karachi- A. Non inertial frame of reference
- B. Rotational motion
- C. Simple Harmonic Motion
- D. Random Motion
Explanation: Option A: In non-inertial frames of reference, such as those that are accelerating or rotating, the laws of motion are different.
Correct answer: Simple Harmonic Motion- A. 16 J
- B. 8 J
- C. 32 J
- D. 24 J
Explanation: Work done is found using the formula = ½ x k x [(x2)^2 - (x1)^2]= ½ x 400 x [(0.15)^2 - (0.05)^2]= 8 J
Correct answer: 8 J