The opposition to the flow of alternating current produced by a magnetic field and EMF is called?

The opposition to the flow of alternating current produced by a magnetic field and EMF is called?

• A. Inductive reactance
• B. Impedance
• C. Capacitive reactance
• D. Resistance

Answer: (A)

Inductive reactance is the opposition to alternating current caused by the inductor’s magnetic field. When AC flows through an inductor, the current continually changes, which changes the magnetic field around the coil. This changing magnetic flux induces a back-emf that resists the current’s change, per Lenz’s law. The result is a resistive-like opposition that grows with frequency, described by X_L = 2πfL, where f is frequency and L is inductance. This type of opposition is a part of impedance and is distinct from resistance (which doesn’t depend on frequency) and capacitive reactance (which arises from capacitors and decreases with frequency, X_C = 1/(2πfC)).

Inductive reactance is the opposition to alternating current caused by the inductor’s magnetic field. When AC flows through an inductor, the current continually changes, which changes the magnetic field around the coil. This changing magnetic flux induces a back-emf that resists the current’s change, per Lenz’s law. The result is a resistive-like opposition that grows with frequency, described by X_L = 2πfL, where f is frequency and L is inductance. This type of opposition is a part of impedance and is distinct from resistance (which doesn’t depend on frequency) and capacitive reactance (which arises from capacitors and decreases with frequency, X_C = 1/(2πfC)).