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Resonance in AC Circuits Online Exam Quiz

Important questions about Resonance in AC Circuits. Resonance in AC Circuits MCQ questions with answers. Resonance in AC Circuits exam questions and answers for students and interviews.

If the resonant frequency in a series RLC circuit is 50kHz along with a bandwidth of 1kHz, find the quality factor.

Options

A : a. 5

B : b. 50

C : c. 100

D : d. 500

What is the SI unit for quality factor?

Options

A : a. Hz

B : b. kHz

C : c. MHz

D : d. No unit

What happens to the quality factor when the bandwidth increases?

Options

A : a. Increases

B : b. Decreases

C : c. Remains the same

D : d. Becomes zero

What happens to the quality factor when resonant frequency increases?

Options

A : a. Increases

B : b. Decreases

C : c. Remains the same

D : d. Becomes zero

Resonance frequency occurs when __________________

Options

A : a. X?=Xc

B : b. X?>Xc

C : c. X?<Xc

D : d. Cannot be determined

The current leads the supply voltage in a series RLC circuit has its frequency _________ the resonant frequency.

Options

A : a. Above

B : b. Below

C : c. Equal to

D : d. Cannot be determined

What is the power factor of a series RLC circuit under resonance condition?

Options

A : a. 0

B : b. 1

C : c. Infinity

D : d. 100

The current lags the supply voltage in a series RLC circuit has its frequency _________ the resonant frequency.

Options

A : a. Above

B : b. Below

C : c. Equal to

D : d. Cannot be determined

What is the correct formula for quality factor?

Options

A : a. Q=BW*fr

B : b. Q=BW/fr

C : c. Q=fr/BW

D : d. Q=frĀ²

Quality factor is also known as _________

Options

A : a. Voltage magnification

B : b. Current magnification

C : c. Resistance magnification

D : d. Impedance magnification

At resonance condition, the voltage across the capacitor and inductor is _________ the source voltage.

Options

A : a. Greater than

B : b. Less than

C : c. Equal to

D : d. Much less than

What is the voltage across the capacitor when the source voltage is 100V and the Q factor is 10?

Options

A : a. 100V

B : b. 10V

C : c. 1000V

D : d. 0V

Find the Q factor when the voltage across the capacitor is 1000V and the source voltage is 100V.

Options

A : a. 10

B : b. 20

C : c. 30

D : d. 40

Find the source voltage when the voltage across the capacitor is 1000V and the Q factor is 10.

Options

A : a. 10V

B : b. 200V

C : c. 100V

D : d. 90V

What is the voltage across the inductor when the source voltage is 200V and the Q factor is 10?

Options

A : a. 100V

B : b. 20V

C : c. 2000V

D : d. 0V

Find the Q factor when the voltage across the inductor is 2000V and the source voltage is 100V.

Options

A : a. 10

B : b. 20

C : c. 30

D : d. 40

Find the source voltage when the voltage across the inductor is 2000V and the Q factor is 20.

Options

A : a. 10V

B : b. 200V

C : c. 100V

D : d. 90V

What happens to the voltage across the capacitor when the Q factor increases?

Options

A : a. Increases

B : b. Decreases

C : c. Remains the same

D : d. Becomes zero

What happens to the voltage across the inductor when the Q factor decreases?

Options

A : a. Increases

B : b. Decreases

C : c. Remains the same

D : d. Becomes zero

The energy stored in the capacitor is of _________ nature.

Options

A : a. Electrostatic

B : b. Magnetic

C : c. Neither electrostatic nor magnetic

D : d. Either electrostatic or magnetic

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