How does mutual inductance influence AC circuits?

How does mutual inductance influence AC circuits?

• A. It causes resistance in a single coil
• B. It increases the current in both coils
• C. It induces voltage in one coil from a changing current in another
• D. It zeroes out the current in nearby coils

Answer: (C)

Mutual inductance is a fundamental principle in AC circuits where it refers to the ability of one coil to induce a voltage in another coil due to a changing current in the first coil. When the current flowing through one coil changes, it creates a changing magnetic field around that coil, which can induce a voltage in a second coil that is located nearby. This effect is crucial in transformers and many other applications such as inductive coupling and wireless energy transfer. In AC circuits, the current constantly changes direction and magnitude, leading to a continuous change in the magnetic field. This changing magnetic field results in the establishment of an induced electromotive force (emf) in the second coil, which may cause current to flow in that coil depending on its own impedance and the instantaneous voltage induced. This interplay allows AC systems to function effectively and is integral in devices that rely on electromagnetic induction. The other choices do not accurately represent the concept of mutual inductance and its effects. While resistance and current changes in coils are pertinent to electrical circuits, they don’t apply specifically to the inductive relationship between coils as described in mutual inductance.

Mutual inductance is a fundamental principle in AC circuits where it refers to the ability of one coil to induce a voltage in another coil due to a changing current in the first coil. When the current flowing through one coil changes, it creates a changing magnetic field around that coil, which can induce a voltage in a second coil that is located nearby. This effect is crucial in transformers and many other applications such as inductive coupling and wireless energy transfer.

In AC circuits, the current constantly changes direction and magnitude, leading to a continuous change in the magnetic field. This changing magnetic field results in the establishment of an induced electromotive force (emf) in the second coil, which may cause current to flow in that coil depending on its own impedance and the instantaneous voltage induced. This interplay allows AC systems to function effectively and is integral in devices that rely on electromagnetic induction.

The other choices do not accurately represent the concept of mutual inductance and its effects. While resistance and current changes in coils are pertinent to electrical circuits, they don’t apply specifically to the inductive relationship between coils as described in mutual inductance.