" What was the amplitude after "

What is the amplitude of the body in resonance ?

A sinusoidal carrier wave of amplitude 40 V is amplitude modulated by a sinusoidal signal voltage. What is the amplitude of each side band if the modulation index is 25%.

What is an amplitude ?

After 100 complete oscillations, a pendulum's amplitude becomes 1/3rd of its initial value. What will be its amplitude after 200 complete oscillations? Express it as a fraction of the initial amplitude.

The amplitude (A) of damped oscillator becomes half in 5 minutes. The amplitude after next 10 minutes will be