What are the properties of series and parallel resonance?
Give comparison between: Series and parallel resonance….Welcome back.
| Parameter | Series circuit | Parallel Circuit |
|---|---|---|
| Impedance at Resonance | Z= R and is min | Z=LCR and is max |
| Power factor at resonance | Unity | Unity |
| Resonant frequency | f0=12π√LC | f0=12π√1LC−R2L2 |
| Q factor | Q=2πf0LR | Q=2πf0LR |
What are the uses of series and parallel resonance?
A series resonant circuit provides voltage magnification. A parallel resonant circuit provides current magnification. A parallel resonant circuit can be used as load impedance in output circuits of RF amplifiers. Due to high impedance, the gain of amplifier is maximum at resonant frequency.
What is application of resonance?
One use for resonance is to establish a condition of stable frequency in circuits designed to produce AC signals. Usually, a parallel (tank) circuit is used for this purpose, with the capacitor and inductor directly connected together, exchanging energy between each other. Resonant circuit serves as filter.
What is the importance of resonance?
The motor will start to jump, rattle, jolt and will do whatever thing possible leading to the motor’s breakage and ultimate failure. This is the reason why resonance is a very important term in the field of vibration and in the day to day articles we use.
What do you mean by resonance class 11?
Define resonance – definition When a molecule is represented by two or more hybrid tructures and that structure are different in the position of electrons not in position of atoms, then the structure is called as resonating structure and this phenomenon is called as resonance.
What is resonance explain with two examples?
In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies. [ example ] A familiar example is a playground swing, which acts as a pendulum.
What are the characteristics of resonance?
Characteristics of resonance
- The contributing structures do not have any real existence.
- As a result of resonance, the bond length in a molecule becomes equal.
- The resonance hybrid has lower energy and hence greater stability there any of the contributing structure.
Who discovered resonance?
Galileo
What is the history of resonance?
The mechanism of resonance was introduced into quantum mechanics by Werner Heisenberg in 1926 in a discussion of the quantum states of the helium atom. He compared the structure of the helium atom with the classical system of resonating coupled harmonic oscillators.
What is resonance vibration?
A vibration resonance occurs when equipment or a product is exposed to an external forced vibration occurring at one or more of its natural frequencies. The resulting product response vibration is amplified and can be huge! Examples of vibration resonances can be seen below and in our video page.
What is resonance effect and its types?
There are two types of Resonance effects namely positive resonance effect and negative resonance effect. Positive Resonance Effect- Positive resonance effect occurs when the groups release electrons to the other molecules by the process of delocalization.
What is positive resonance effect?
Positive Resonance Effect- Positive resonance effect occurs when the groups release electrons to the other molecules by the process of delocalization. The groups are usually denoted by +R or +M. In this process, the molecular electron density is said to decrease. For example- -NO2, C=O, -COOH, -C≡N.
What is resonance effect in simple words?
Resonance effect is the polarity produced in a molecule due to interaction between a lone pair of electron and a pi bond or it is produced due to interaction of two pi bonds between two adjacent atoms.
Which is the most stable radical?
triphenylmethyl radical
Which carbocation is more stable and why?
Tertiary carbocations are more stable than secondary carbocations. Via an effect known as hyperconjugation. A neighbouring C-H bond will make it more stable by donating some of its electron density into a carbocation’s empty p-orbital.
Which Carbocation is most stable and why?
Now if a greater number of alkyl groups is attached to the positively charged carbon, there will be greater dispersal of positive charge on the alkyl groups and hence, more will be the stability of the carbocation. Therefore, 3o carbocation is most stable followed by 2o and 1o carbocations.
Which alkene is more stable and why?
Figure 7.6. 3: Trans-2-butene is the most stable because it has the lowest heat of hydrogenation. In cycloalkenes smaller than cyclooctene, the cis isomers are more stable than the trans as a result of ring strain.
Which is more stable E or Z?
Usually, E isomers are more stable than Z isomers because of steric effects. When two large groups are closer to each other, as they often are with Z, they interfere more with each other and have a higher potential energy than with E, where the large groups are farther apart and interfere less with each other.
Are alkynes more stable than alkenes?
Alkynes are less stable then alkenes and alkanes despite the bond being stronger. This is not really intuitive, because you’d think that stronger bonds are more stable, correct? But in this case, the stronger bonds in alkenes/alkynes have higher bond energy and thus more unstable than alkanes.