What term describes rapid and interrupted current that changes direction?

What term describes rapid and interrupted current that changes direction?

• A. DC
• B. AC
• C. Transformer
• D. Solenoid

Answer: (B)

Current that reverses direction periodically is called alternating current. In AC, the flow of electrons oscillates, so the current goes forward and backward in a regular cycle, with the reversal happening at a specific frequency (like 60 Hz in household power in many places). This is different from direct current, which flows in one direction and doesn’t reverse. The phrase “rapid and interrupted current that changes direction” describes alternating current, since the direction is continually changing rather than staying constant. Transformers rely on this changing current to operate, because a changing current creates a changing magnetic field that can induce voltage in nearby windings. A solenoid is merely a coil and can be driven by either type of current, but the concept in question is the one that specifically involves a current that reverses direction.

Current that reverses direction periodically is called alternating current. In AC, the flow of electrons oscillates, so the current goes forward and backward in a regular cycle, with the reversal happening at a specific frequency (like 60 Hz in household power in many places). This is different from direct current, which flows in one direction and doesn’t reverse. The phrase “rapid and interrupted current that changes direction” describes alternating current, since the direction is continually changing rather than staying constant. Transformers rely on this changing current to operate, because a changing current creates a changing magnetic field that can induce voltage in nearby windings. A solenoid is merely a coil and can be driven by either type of current, but the concept in question is the one that specifically involves a current that reverses direction.