Question

What are some examples of resonance?

Answer 1

Hint:Resonance occurs during the frequency of the force is equivalent to one of the natural frequencies of vibration of the driven harmonic oscillator. Swing, Pendulum, Bridge, Guitar, and Music system are a few instances of resonance. Resonance happens while a system can store and quickly transfer energy between two or more distinct storage modes.

Complete answer: Resonance occurs when an outer force and a vibrating system force different systems around it to oscillate with higher amplitude at a particularized frequency of process. The frequency when the second body starts vibrating at greater amplitude is the body's resonant frequency.
$1$. A swing is one of the common examples of resonance. When we apply force to the swing, it starts going forth and backward. The person who is accelerating the string has to balance the swing's timing. It makes the motion of the swing have increased amplitude to reach higher. Once the swing matches with its natural frequency of oscillation, a moderate push to the swing help to keep its amplitude due to resonance, but if the push provided is abnormal, the swing will gradually vibrate, and this is out-of-sync motion, and it will never lead to resonance, and the swing will not go longer.
$2$. A guitar gives sound only by vibration. When we pluck a string in an acoustic guitar, it waves and gives the sound energy into the vacant wooden body of the guitar, making it resonate and amplify the sound.
When the musician strikes the string in an electric guitar, it vibrates, and the electromagnetic machine in the guitar changes this oscillation into an electrical signal transmitted to the amplifier. The amplifier sends oscillations onto the speaker. If the speakers' frequency matches the guitar's vibration, it results in a sound called audio feedback.
$3$. If we start the pendulum, it will move backward and forward. Continuous pushing at regular time intervals will make an increase in the motion of the pendulum. If regular forces are given to the pendulum, its motion can be built enormously.
$4$. The walls and furniture of our home are vibrating when we play music on a heavy beat because the natural frequency of the furniture matches the sound of the music, hence causing them to vibrate.
$5$. When we change the knob of the radio to our favourite sound, we are switching the natural frequency of the transistor. It matches the carrying frequency of the radio station. When two frequencies are equal, energy transfer happens, and we hear the selected channel.

Additional Information:
Resonance phenoms occur with vibrations: acoustic resonance, mechanical resonance, nuclear magnetic resonance, electromagnetic resonance, electron spin resonance, and quantum wave functions. Resonant systems can generate vibrations of a specific frequency from a mixed vibration including many frequencies.

Note:
Resonance explains increased amplitude when the frequency of a systematically implemented force is the same or nearby to a natural frequency of the system at which it works. When a vibrating force is acted at a resonant frequency, the system will vibrate at a greater amplitude than when the equal force is applied at non-resonant frequencies.