AN ALTERNATING CURRENT CAN INDUCE VOLTAGE BECAUSE IT HAS

• A. ripple value
• B. varying magnetic field ✓
• C. weaker magnetic field than direct current
• D. high peak value

The answer to the question is: B. varying magnetic field

An alternating current (AC) can induce voltage because it has a varying magnetic field. When an alternating current flows through a conductor, it generates a magnetic field that constantly changes direction, which in turn induces a voltage in nearby conductors or coils. This phenomenon is known as electromagnetic induction and is the fundamental principle behind the operation of transformers, generators, and other electrical devices.

The varying magnetic field produced by the alternating current causes the magnetic flux through a nearby conductor or coil to change, resulting in the induction of an electromotive force (EMF) or voltage. This process is described by Faraday’s law of electromagnetic induction, which states that the induced EMF is proportional to the rate of change of the magnetic flux through the circuit.

In contrast, direct current (DC) does not induce voltage in nearby conductors or coils as effectively as AC because it produces a constant, unchanging magnetic field. The fluctuating nature of the magnetic field in AC allows for more efficient induction of voltage in surrounding circuits.

In summary, an alternating current can induce voltage due to its varying magnetic field, which leads to the generation of an electromotive force through electromagnetic induction.