A very brief period of increased voltage, from sub-cycle to 60 cycles in length, is called a ___.

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Multiple Choice

A very brief period of increased voltage, from sub-cycle to 60 cycles in length, is called a ___.

Explanation:
The main idea is identifying the type of short-term voltage disturbance. A very brief rise in voltage lasting from less than one cycle up to about 60 cycles is called a swell. It’s specifically a momentary overvoltage, the opposite of a sag (which is a brief voltage dip). A ramp would be a gradual change, not a sudden brief spike, and a generic over-voltage doesn’t specify the duration. So, the term that matches a tiny, short-lived increase in voltage is a swell.

The main idea is identifying the type of short-term voltage disturbance. A very brief rise in voltage lasting from less than one cycle up to about 60 cycles is called a swell. It’s specifically a momentary overvoltage, the opposite of a sag (which is a brief voltage dip). A ramp would be a gradual change, not a sudden brief spike, and a generic over-voltage doesn’t specify the duration. So, the term that matches a tiny, short-lived increase in voltage is a swell.

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