Free Test Damped & forced oscill... – NEET

Q1: What is damping in oscillatory motion?

A. A method to increase amplitude B. A method to maintain frequency C. A force that opposes motion and reduces amplitude D. A force that increases oscillations

Q2: Which of the following is a cause of damping?

A. Friction B. Elastic force C. Restoring force D. Inertia

Q3: In damped harmonic motion, amplitude _____ with time.

A. increases B. remains constant C. decreases D. first increases then decreases

Q4: The equation of damped harmonic motion includes which additional term?

A. Restoring force B. Damping force C. External force D. Elastic force

Q5: Which factor does not affect damping?

A. Mass of the system B. Damping coefficient C. Amplitude D. Driving frequency

Q6: Forced oscillations occur when:

A. A system oscillates without any resistance B. An external periodic force is applied C. The system is at resonance D. Amplitude remains zero

Q7: Resonance in forced oscillations occurs when:

A. Driving frequency equals natural frequency B. Damping is maximum C. Amplitude becomes zero D. Force becomes zero

Q8: What happens to the amplitude at resonance?

A. It becomes zero B. It becomes minimum C. It becomes maximum D. It stays constant

Q9: Light damping causes the oscillation to:

A. Stop immediately B. Continue with constant amplitude C. Die out slowly D. Become chaotic

Q10: Heavy damping results in:

A. Rapid oscillations B. Critical speed C. No oscillations D. Infinite energy

Q11: In underdamped systems, the motion is:

A. Oscillatory B. Non-oscillatory C. Constant velocity D. Unstable

Q12: Which graph best shows amplitude vs time for damped oscillation?

A. Straight line B. Parabola C. Exponentially decreasing curve D. Sine wave with increasing amplitude

Q13: Critical damping returns system to equilibrium in:

A. Maximum time B. Minimum time without oscillation C. Infinite time D. Oscillatory fashion

Q14: Which of the following increases damping?

A. Smooth surface B. Increased air pressure C. Less friction D. Vacuum

Q15: Quality factor (Q-factor) is:

A. Ratio of restoring to damping force B. Measure of damping C. Ratio of energy stored to energy lost per cycle D. Measure of frequency

Q16: A system with high Q-factor has:

A. High damping B. Sharp resonance peak C. Broad resonance curve D. Low amplitude

Q17: Which of these is an example of forced oscillation?

A. Pendulum swinging freely B. Tuning fork struck once C. Child pushed on a swing periodically D. Ball falling under gravity

Q18: If damping increases, resonance curve becomes:

A. Narrow and sharp B. Broader and lower C. Unchanged D. Steeper

Q19: Mechanical resonance can be dangerous because:

A. It produces sound B. It increases damping C. It can cause structural failure D. It reduces frequency

Q20: Which condition represents forced oscillation equation?

A. m d²x/dt² + kx = 0 B. m d²x/dt² + b dx/dt + kx = 0 C. m d²x/dt² + b dx/dt + kx = F₀ cos(ωt) D. m dx/dt + kx = 0

Quiz for Damped & forced oscillations