is generally considered as unidirectional and not varying with time

A voltage that is varies with time may be called varying direct voltage

It is simply a voltage rising(or failing ) at constant rate

It is a periodic ramp signal

It is simply a symmetrical ramp.

The sinusoidal signal is a voltage that vary with time according to a cosine function

It is characterized by amplitude and
frequency.

is a signal defined by amplitude and pulse width

Pulses can't have negative polarit

a signal that varies in time

Pluses signal

is simply a (voltage or current)jump of very short duration

is the transition from one voltage (or current) level to another and staying there at the new level .

Pacifier is a circuit that convert AC to DC

Half-wave rectifier will generate a waveform Vo

What is the ideal diode's behavior in the region of conduction?

Which atoms are referred to as tetravalent atoms?

What is the process called when impurity atoms are added to a semiconductor material?

Which impurity atoms are used to create an n-type material?

What is the term for the maximum reverse-bias potential before entering the Zener region?