Quiz sheet for harmonics and resonance in an AC circuit

Harmonic voltages and currents will increase the rotor winding and stator winding losses in motors.

A) Too right

B) Bullshit

ANSWER: A

Skin effect is observed in which of the circuits:

A) AC circuits

B) DC circuits

ANSWER: A

Because of the harmonics, there can be risk or fire and electric shock

A) Yup

B) Naah

ANSWER: A

The frequency of the power waveform between two lines of a 400 volt 50 Hz supply is:

A) 100 Hz

B) 50 Hz

C) 300 Hz

D) 0 Hz

ANSWER: A

When one or more harmonic components are added to the fundamental frequency, a non distorted (nonsinusoidal) waveform is produced.

A) True

B) False

ANSWER: A

Which of the following circuits will have more sensitivity towards Harmonics

A) Communication Circuits

B) Power Circuits

ANSWER: A

Because of the harmonics, conductor resistance will

A) increase

B) decrease

ANSWER: A

Due to Harmonics in Transformer which of the following losses increases:

A) Both Hysteresis loss and eddy current loss

B) Hysteresis Loss only

C) Eddy Current Loss only

ANSWER: A

Which of the following device is not the source of harmonics:

A) Purely resistive loads

B) Ferromagnetic devices

C) Computers

D) Arcing devices

ANSWER: A

Harmonics can be eliminated by introducing which of the following:

A) Filters

B) Resonant circuit

C) Low impedance path

D) High Impedance

ANSWER: A


Last modified: Monday, 31 May 2021, 9:22 PM