Exam 16: Alternating Voltage and Current

Short wavelengths for frequencies of 300 MHz or higher are called ______________.

One complete revolution of a waveform is called a cycle.

The amount of time it takes for one cycle is called the ______________.

A sine wave is proportional to the sine of an angle of rotation in the circular motion producing the voltage.

Alternating current generators are

For a complete sine wave of alternating voltage, the average value is

The symbol for a ______________ angle is θ.

Which of the following is not an advantage of three-phase ac voltage?

In a motor, what connects to the electrical source that drives the motor?

The ______________ range includes frequencies that can be heard as sound waves by the human ear.

What are graphic connectors that are spring-mounted in order to brush against the spinning rings on a rotor?

The full-cycle of revolution is also called an alternation.

Which of the following is an advantage of ac over dc power?

λ is the symbol used to represent ______________.

The sawtooth wave is also referred to as a ______________ voltage.

An oscilloscope cannot measure or display the peak-to-peak values of an ac waveform.

The numerical value ofis $\pi$

When the amplitude of a sine wave is measured with an ac current meter, the value displayed by the meter will be the waveform's ______________ value.

In an ac circuit with only ______________, the current variations are in phase with the applied voltage.

To compare the phase relationship between two ac sine waves, both sine waves must have exactly the same frequency.