What role does the magnetic field play in self-inductance?

What role does the magnetic field play in self-inductance?

• A. It creates a path for current to flow
• B. It opposes the change in current
• C. It enhances the voltage
• D. It limits the circuit current

Answer: (B)

Self-inductance is a property of an electrical circuit that creates an electromotive force (EMF) in response to changes in current. This phenomenon occurs because a changing current generates a magnetic field, which in turn induces a voltage that opposes the initial change in current, according to Lenz's law. This opposing action is crucial as it stabilizes the current flowing through the circuit. Essentially, the magnetic field generated by the current creates a feedback mechanism that resists any fluctuations, maintaining the overall stability of the current flow. Thus, the role of the magnetic field in self-inductance is fundamentally to oppose changes in current, aligning perfectly with the principle of inductance in electrical circuits.

Self-inductance is a property of an electrical circuit that creates an electromotive force (EMF) in response to changes in current. This phenomenon occurs because a changing current generates a magnetic field, which in turn induces a voltage that opposes the initial change in current, according to Lenz's law. This opposing action is crucial as it stabilizes the current flowing through the circuit. Essentially, the magnetic field generated by the current creates a feedback mechanism that resists any fluctuations, maintaining the overall stability of the current flow. Thus, the role of the magnetic field in self-inductance is fundamentally to oppose changes in current, aligning perfectly with the principle of inductance in electrical circuits.