Resonance - Definition, Types, Examples, FAQs

Resonance Definition Physics: Explain Resonance

Some systems in physics have a tendency to oscillate with increased amplitude at a specific frequency, and this is known as resonance. The natural frequency of an object when it tends to vibrate at a higher amplitude is known as Resonant frequency.. The occurrence of resonance is linked to many types of vibrations or waves. Mechanical, sound and electromagnetic wave functions can all cause resonance.

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This Story also Contains

1. Resonance Definition Physics: Explain Resonance
2. What is resonance or What is meant by resonance?
3. Types of Resonance physics
4. Some Resonance Examples

Acoustic systems like musical instruments and the human voice were the first to be studied for resonance. The vibration created in a violin or piano string of a specific pitch when a musical note of the same pitch is sung or played nearby is an example of acoustical resonance.

NCERT Physics Notes:

• NCERT Notes Class 11th Physics
• NCERT Notes Class 12th Physics
• NCERT Notes For All Subjects

What is resonance or What is meant by resonance?

Resonance Definition: Resonance meaning is as forced motion in tune with a system's natural oscillation frequency, also known as the resonant frequency. When you drive the system in the appropriate direction, it creates resonance and raises its amplitude. Every object has a unique resonant frequency.

Types of Resonance physics

There are several types of resonance physics, including:

• Mechanical Resonance physics
• Acoustic Resonance physics
• Electrical resonance physics
• Optical Resonance physics

Also read -

• NCERT Solutions for Class 11 Physics
• NCERT Solutions for Class 12 Physics
• NCERT Solutions for All Subjects

Some Resonance Examples

Instruments of Music: What is natural frequency

The best instances of resonance can be found in a wide range of musical instruments. When someone knocks, strikes, strums, drums, or tweaks a musical instrument, it is set into oscillation or vibration at the instrument's natural frequency of vibration. The harmonics of a musical instrument are the natural frequencies of the instrument in question. The first object can be compelled to vibrate at a frequency higher than its natural harmonic frequency if a second interconnected object or instrument vibrates or oscillates at that specific frequency. Resonance occurs when one thing vibrates or oscillates at the natural frequency of another object, causing the other object to vibrate at a frequency higher than its natural frequency.

Bridge

Soldiers marching across the bridge are told to take frequent breaks since their rhythmic marching can produce significant vibrations at the bridge's inherent frequency. If the synchronised footfall resonates with the bridge's natural frequency, the bridge may fall apart. The Tacoma Bridge Collapse is an example of the above, in which the frequency of the air matched the frequency of the bridge, resulting in its demise.

Swing

When pressing the swing, remember that the push should be supplied at the same interval as the swing's natural rotation, and then the swing's dimension will only increase. That is, whenever the hammock deviates from its normal position. If it is pushed on a different frequency without taking into account the factors discussed above, the effect can be very low, zero, or even negative.

Laser

A laser is an electromagnetic wave with the unique property of being very convergent, meaning that the frequency of all of its photons is equal to or very close to one. Furthermore, the phases of all vibrations are the same. Optical resonance in an optical cavity is also used to create the laser.

The Resonance Principle

If the resonance of frequency of a linear oscillator is and it is driven by a source frequency, the strength of the oscillations may be calculated using the equation:

f=1/2πLC, where L is inductor and C, is the capacitance

Also to find the resonant frequency of a single continuous-wave

v=λF

where v is wave velocity and λ is the distance of wavelength and f is the resonant frequency.

Also read :

• NCERT notes Class 11 Physics Chapter 14 Oscillations
• NCERT solutions for Class 11 Physics Chapter 14 Oscillations
• NCERT Exemplar Class 11 Physics Solutions Chapter 14 Oscillations

Important Resonance Elements: -

Three elements are required for the occurrence of Resonance:

1. When an object is vibrating at the natural frequency of a second object.

2. A driving force with the same frequency as the system's natural frequency.

3. The factors that can deplete the system's energy must be kept to a minimum.

(Note: Friction, Viscosity, and Resistance are some of the elements that cause energy loss in a system.)

Resonance frequency consequences: -

The resonant frequency has the following consequences:

1. Vibrating an object at its natural frequency is simple, but vibrating an object at the opposite frequency is difficult.

2. A vibrating item selects from complex excitation only the frequency that is equal to its own frequency. As a result, it functions as a Filter.

3. Resonant frequencies are found in most vibrating items.

Also check-

• NCERT Exemplar Class 11th Physics Solutions
• NCERT Exemplar Class 12th Physics Solutions
• NCERT Exemplar Solutions for All Subjects