An alternating current or voltage_
Correct answer: D. changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals
- A. fluctuates off and on
- B. varies in magnitude alone
- C. changes its direction again and again
- D. changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals
Explanation
Alternating current (AC) or voltage undergoes continuous variations in magnitude and regularly reverses its direction of flow. This characteristic is represented by a sinusoidal waveform, where the current or voltage changes smoothly from positive to negative and back again over time.
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Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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