Forced Oscillations — Practice Quiz

Question 1

Steady-state amplitude is MAXIMUM when:

Accepted Answer

Driving frequency = natural frequency

Answer

Driving frequency = 0

Answer

Driving frequency → infinity

Answer

Drive force is small

Question 2

At resonance, phase between drive and response is:

Accepted Answer

π/2

Answer

0

Answer

π

Answer

Random

Question 3

Forced oscillator at steady state has frequency:

Accepted Answer

Driving frequency ω_d

Answer

Natural frequency ω₀

Answer

Average of both

Answer

Zero

Question 4

If damping is reduced, the resonance peak becomes:

Accepted Answer

Higher and sharper

Answer

Lower and broader

Answer

Stays the same

Answer

Disappears

Question 5

Tacoma Narrows Bridge collapse (1940) is a famous example of:

Accepted Answer

Forced oscillation at resonance

Answer

Pure SHM

Answer

Damped oscillation

Answer

Standing waves