A parallel resonant circuit stores the circuit energy in the magnetic field of the inductor and the electric field of the capacitor. This energy is constantly being transferred back and forth between the inductor and the capacitor which results in **zero current and energy being drawn from the supply**.

What is the effect of on the resonance circuit?

Effects of Series Resonance

i.e Zr = R. At the resonance condition, as the impedance of the circuit is minimum, the current in the circuit is maximum. i.e **Ir = V/Zr = V/R**. As the value of resonant current Ir is maximum hence, the power drawn by the circuit is also maximized.

**What is parallel resonance circuit?**

**A parallel circuit consisting of inductor and capacitor in which the inductive reactance and the capacitive reactance are equal and obtain maximum impedance at the frequency at which the circuit is resonant**.

**Why parallel resonance is called current resonance?**

Explanation: As a parallel resonance circuit only functions on resonant frequency, this type of circuit is also known as an Rejecter Circuit because **at resonance, the impedance of the circuit is at its maximum thereby suppressing or rejecting the current whose frequency is equal to its resonant frequency**.

**Which values decreases in parallel resonance?**

A parallel resonant circuit is resistive at resonance, inductive below resonance, capacitive above resonance. Impedance is maximum at resonance in a parallel resonant circuit, but decreases **above or below resonance**. Voltage is at a peak at resonance since voltage is proportional to impedance (E=IZ).

## What is parallel resonant circuit state conditions for parallel resonance?

For resonance in a parallel LC circuit, **the instantneous current should be minimum, ideally zero**.

## What happens at resonance frequency?

Resonant frequency is **the oscillation of a system at its natural or unforced resonance**. Resonance occurs when a system is able to store and easily transfer energy between different storage modes, such as Kinetic energy or Potential energy as you would find with a simple pendulum.

## What is series resonance and parallel resonance?

Series resonance refers to the resonance that occurs in circuits where capacitors and inductors are connected in series, whereas parallel resonance refers to the resonance that occurs in circuits where the capacitors and inductors are connected in parallel.

## Where is parallel resonance used?

Application of Parallel Resonance Circuit:

(1) The parallel resonance circuit is also used for Tuning purpose. (2) The parallel resonance circuit is used **in Induction heating system**. (3) The parallel resonance circuit is used as a Current Amplifier. (4) The parallel resonance circuit is also used as a filter circuit.

## What is resonance in circuit?

Electrical resonance occurs in an electric circuit at a particular resonant frequency **when the impedances or admittances of circuit elements cancel each other**. In some circuits, this happens when the impedance between the input and output of the circuit is almost zero and the transfer function is close to one.

## What is resonance frequency in LCR circuit?

Resonance frequency is defined as **the frequency at which the impedance of the LCR circuit becomes minimum or current in the circuit becomes maximum**.

## 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 parallel circuit known as?

So, series circuits are also called **Voltage dividers**. For parallel circuits, it’s the opposite, as voltage will flow the same in each path, the current get’s dropped/separated for each path. For that very behaviour, these circuits are also called as Current dividers.

## Is the resistance in parallel with a parallel resonant circuit is reduced the bandwidth?

Hence bandwidth is directly proportional to resistance(R) so **when R decreases bandwidth also decreases**.

## What effect will a parallel tank have upon final filter current?

8. What effect will a parallel tank have upon final filter current? **The bandpass frequencies will change**.

## Why the value of current in series resonant circuit is maximum at resonance?

So, in a series resonant circuit, voltage across resistor is equal to supply voltage i.e V = V_{r}. In series RLC circuit current, I = V / Z but at resonance current I = V / R, therefore the current at resonant frequency is maximum as **at resonance in impedance of circuit is resistance only and is minimum**.

## What is parallel LCR resonant circuit obtain an expression for resonant frequency?

By equating them we can get the condition for resonance in the series LCR circuit. **XL=XCωL=1ωCω2=1LC⇒ω=1√LC**. This is the expression for resonant frequency for a series LCR circuit at which the resonance occurs. It is inversely related to the values of inductance and capacitance of the circuit.

## When resonant frequency for an RLC parallel circuit is given by the essential condition is that?

When resonant frequency of an RLC parallel circuit is given by 1/2π√(LC), the essential condition is that. (a) **impedance must be non-resistive**.

## How the series resonant circuit will behave under the condition of resonance?

Resonance occurs when X_{L} = X_{C} and the imaginary part of the transfer function is zero. **At resonance the impedance of the circuit is equal to the resistance value as Z = R**. At low frequencies the series circuit is capacitive as: X_{C} >, X_{L}, this gives the circuit a leading power factor.

## What affects resonant frequency?

Resonance, An object free to vibrate tends to do so at a specific rate called the object’s natural, or resonant, frequency. (This frequency depends on **the size, shape, and composition of the object**.)

## Why is resonance frequency important?

The importance of resonance is that **the circuit can either absorb or dissipate the maximum amount of energy at resonance**. One practical example is used in a radio receiver. Many the frequencies from different radio stations are impinging on the radio’s antenna at the same time.

## What is resonance frequency in vibration?

Resonant frequency is **the natural frequency where a medium vibrates at the highest amplitude**. Resonant frequency is usually denoted as f_{0}.

## Is this resonance circuit connected in parallel or series?

A parallel L-C circuit in which magnitudes of capacitive and inductive reactances are exactly equal is known as parallel resonant circuit as mentioned above. It is also known as rejector circuit.

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parallel resonant circuit.

Specifications | Series resonance circuit | Parallel resonance circuit |
---|---|---|

It magnifies | Voltage | Current |

## What is meant by resonance in series and parallel RLC circuit?

Resonance occurs in a parallel RLC circuit **when the total circuit current is “in-phase” with the supply voltage as the two reactive components cancel each other out**. At resonance the admittance of the circuit is at its minimum and is equal to the conductance of the circuit.

## What happens at resonance in LCR series circuit?

In LCR series circuits, resonance occurs when the value of inductive and capacitive reactances have equal magnitude but have a phase difference of 180°. Thus, **they cancel each other**.

## How do you change the resonance frequency in LCR circuit?

**To reduce the resonant frequency in an LCR series circuit with a generator.**

- A. The generator frequency should be reduced.
- B. Another capacitor should be added in parallel to the first.
- C. The iron core of the inductor should be removed.
- D. Dielectric in the capacitor should be removed.

## What are the factors on which the resonant frequency of a series LCR circuit depends?

Resonant frequency f=12π√LC. It depends on **the self inductance L of the coil and the caapacitance C of the capacitor**.

## What are the advantages of parallel circuit?

**There is no division of voltage among the appliances when connected in parallel**. The potential difference across each appliance is equal to the supplied voltage. The total effective resistance of the circuit can be reduced by connecting electrical appliances in parallel.

## What is the purpose of parallel circuit?

A parallel circuit has one function: **to keep the electricity flowing when one pathway is interrupted**. A prime example is light fixtures that use multiple light bulbs. When a single bulb in the fixture goes the light fixture continues to operate.

## What is resonance impedance?

Resonance is the result of oscillations in a circuit as stored energy is passed from the inductor to the capacitor. Resonance occurs when XL = XC and the imaginary part of the transfer function is zero. At resonance, the impedance of the circuit is **equal to the resistance value as Z = R.**

## What happens to the quality factor when resonant frequency increases Mcq?

Quality factor is directly proportional to resonant frequency. So, if resonant frequency increases **quality factor increases**.

## What is the value of resonant frequency if the value of C in a series RLC circuit is decreased?

From the above equation, the resonant frequency of the series RLC circuit is inversely proportional to the square root of the capacitance. By the above equation, the value of the capacitance $C$ in a series RLC circuit is decreased, then the resonant frequency in a series RLC circuit is increased.

## When R in a parallel RLC circuit is increased its Q?

Parallel resonant circuits • For a parallel RLC circuit, the Q factor is the inverse of the series case: • **Q = R = 0 = 0 ** • Consider a circuit where R, L and C are all in parallel. The lower the parallel resistance, the more effect it will have in damping the circuit and thus the lower the Q.

## What is resonance in network analysis?

Resonance occurs **in electric circuits** due to the presence of energy storing elements like inductor and capacitor. It is the fundamental concept based on which, the radio and TV receivers are designed in such a way that they should be able to select only the desired station frequency.

## Which of the following conditions is true for both series and parallel resonance?

Hence the current at this condition is maximum. In parallel RLC circuit, at resonance condition impedance is purely resistive and it is equal to R.

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Detailed Solution.

Specifications | Series resonance circuit | Parallel resonance circuit |
---|---|---|

Current at resonance | Maximum | Minimum |

Effective impedance | R | L/CR |

## When a parallel circuit is in resonance which of the following of the circuit is maximum *?

The maximum current will be at **DC**, limited by the resistance of the components. This answer depends on if the RLC circuit is a series circuit or a parallel circuit. If the circuit is a series RLC then the current is maximized at resonance but if it is a parallel RLC then the current is effectively zero at resonance.

## Why current in series LCR circuit is maximum at resonance and minimum in parallel LCR circuit?

Hint: When a series LCR circuit is in resonance, the impedance of the same series LCR circuit is minimum. This happens because **the inductance and capacitance are equal in magnitude**. As a result of this the current in the series LCR circuit also becomes maximum.

## When LCR series circuit is at resonance then the phase angle between current and voltage is?

The phase difference between the current and voltage in L-C-R circuit at resonance is: 0. **π** **-π**