What characteristic defines an alternating voltage?
Understand the Problem
The question asks about the defining characteristic of an alternating voltage. Specifically, it wants to know how the polarity (positive or negative) behaves in an alternating voltage.
Answer
An alternating voltage varies in both magnitude and polarity with time.
An alternating voltage is defined by its variation in both magnitude and polarity with respect to time. This means the voltage changes its strength and direction periodically.
Answer for screen readers
An alternating voltage is defined by its variation in both magnitude and polarity with respect to time. This means the voltage changes its strength and direction periodically.
More Information
Alternating voltage is commonly associated with alternating current (AC), which is used in most household electrical systems.
Tips
A common mistake is to only consider the change in magnitude, but the change in polarity (direction) is equally important.
Sources
- What is an alternating voltage? - Quora - quora.com
- Alternating current - Wikipedia - en.wikipedia.org
- Alternating Current(AC): Definition, Characteristics & Generator - geeksforgeeks.org
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