This "pinch-off voltage" varies considerably, even among devices of the same type.

Analog electronic circuits are those in which current or voltage may vary continuously with time to correspond to the information being represented.

Similarly, this voltage varies with the emotional state of the subject.

Since the permanent magnet field is constant, the terminal voltage varies directly with the speed of the generator.

The voltage of the black level varies across different television standards.

How does voltage vary with altitude and temperature?

In an AC system it is not desirable to allow voltages to vary more than a small amount with demand.

As a result, the output current is almost constant even if the load resistance and/or voltage vary.

The specific voltage varies with the country and equipment used.

The voltage after breakdown varies only slightly with changing current.