Understanding Waveforms and Electrical Concepts

What is the function of an alternator?

• To convert electrical energy to mechanical energy.

• To convert mechanical energy to electrical energy.

• To store electrical energy.

• To measure electrical energy.

What is the unit of frequency?

• Degree

• Radian

• Hertz

• Cycle

Which instrument is used to display signal waveforms on a screen?

• Oscillator

• Function generator

• Oscilloscope

• Induction motor

What is the formula for a sine wave?

What does the term "duty cycle" refer to in a pulse waveform?

• The time interval between pulses.

• The percentage of time a pulse is present during a cycle.

• The amplitude of the pulse.

• The frequency of the pulse.

What is the time interval of one complete cycle of a periodic waveform called?

• Frequency

• Period

• Amplitude

• Phase

What is the term for the maximum value of a voltage or current?

• Peak value

• Instantaneous value

• rms value

• Average value

What is the term for the time interval required for a pulse to change from 10% to 90% of its amplitude?

• Duty cycle

What is the unit of angular measurement that equals 57.3°?

• Degree

• Radian

• Cycle

• Hertz

What is the term for the difference between the synchronous speed of the stator field and the rotor speed in an induction motor?

• Slip

• Synchronous speed

• Rotor speed

• Stator speed