Unit 8: Oscillations — Online MCQ Test
PHYSICS · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board
Practice Unit 8: Oscillations with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers periodic motion simple harmonic motion SHM SHM and uniform circular motion differential equations simple pendulum energy in SHM and damped forced oscillations..
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Unit 8: Oscillations — Important Questions & Answers
Which of the following is the correct defining condition for simple harmonic motion (SHM)?
- A. Acceleration is directly proportional to displacement and opposite in direction
- B. Velocity is directly proportional to displacement and in the same direction
- C. Acceleration is constant and non-zero
- D. Displacement is always equal to amplitude
Answer: A. Acceleration is directly proportional to displacement and opposite in direction
In SHM, the restoring acceleration is proportional to displacement and always directed toward the mean position. This is the key defining feature of SHM.
In SHM, the restoring acceleration is proportional to displacement and always directed toward the mean position. This is the key defining feature of SHM.
The time period of a simple pendulum depends on:
- A. Mass of the bob only
- B. Length of the pendulum and acceleration due to gravity
- C. Amplitude only
- D. Density of the bob only
Answer: B. Length of the pendulum and acceleration due to gravity
For small oscillations, the time period of a simple pendulum is given by T = 2π√(l/g). It depends on length and gravitational acceleration.
For small oscillations, the time period of a simple pendulum is given by T = 2π√(l/g). It depends on length and gravitational acceleration.
Which of the following is NOT an example of simple harmonic motion?
- A. Mass attached to a spring
- B. Small oscillations of a simple pendulum
- C. Uniform circular motion projected on a diameter
- D. A body moving with constant acceleration in a straight line
Answer: D. A body moving with constant acceleration in a straight line
Constant acceleration in a straight line is not SHM because the restoring acceleration is not proportional to displacement from a mean position. The other three are standard SHM examples or representations.
Constant acceleration in a straight line is not SHM because the restoring acceleration is not proportional to displacement from a mean position. The other three are standard SHM examples or representations.
Which statement about energy in SHM is correct?
- A. Kinetic energy is maximum at the extreme position
- B. Potential energy is minimum at the extreme position
- C. Total energy remains constant in ideal SHM
- D. Both kinetic and potential energies are zero at the mean position
Answer: C. Total energy remains constant in ideal SHM
In ideal SHM without damping, the total mechanical energy remains constant. Kinetic and potential energies continuously exchange, but their sum stays fixed.
In ideal SHM without damping, the total mechanical energy remains constant. Kinetic and potential energies continuously exchange, but their sum stays fixed.
A body executes SHM with amplitude A. At what displacement from the mean position is the potential energy equal to one-fourth of the total energy?
- A. A/4
- B. A/2
- C. A/√2
- D. A
Answer: B. A/2
In SHM, potential energy U = (1/2)kx² and total energy E = (1/2)kA². If U = E/4, then x²/A² = 1/4, so x = A/2.
In SHM, potential energy U = (1/2)kx² and total energy E = (1/2)kA². If U = E/4, then x²/A² = 1/4, so x = A/2.