Which statement correctly describes the relationship between inductance and magnetic fields?

Which statement correctly describes the relationship between inductance and magnetic fields?

• A. Inductance stores energy only in the electric field
• B. Inductance resists changes in current by generating a magnetic field
• C. Inductance repels current flow and decreases magnetic fields
• D. Inductance has no relation to magnetic fields

Answer: (B)

Inductance is about how a circuit resists changes in current through the magnetic field it creates around a conductor. When current flows, it generates a magnetic field. If the current tries to change, the magnetic flux linked with the inductor changes, and a back emf is produced that opposes that change (Lenz’s law). This opposition is why the current cannot change instantaneously, and it’s quantified by V = L di/dt. Energy in an inductor is stored in that magnetic field, given by W = (1/2) L I^2. So the idea that inductance resists changes in current by generating a magnetic field captures the fundamental mechanism: the magnetic field links the current and produces the opposing voltage. The other statements misplace where energy is stored, or how inductance interacts with current and magnetic fields, or ignore the magnetic-field connection altogether.

Inductance is about how a circuit resists changes in current through the magnetic field it creates around a conductor. When current flows, it generates a magnetic field. If the current tries to change, the magnetic flux linked with the inductor changes, and a back emf is produced that opposes that change (Lenz’s law). This opposition is why the current cannot change instantaneously, and it’s quantified by V = L di/dt. Energy in an inductor is stored in that magnetic field, given by W = (1/2) L I^2. So the idea that inductance resists changes in current by generating a magnetic field captures the fundamental mechanism: the magnetic field links the current and produces the opposing voltage. The other statements misplace where energy is stored, or how inductance interacts with current and magnetic fields, or ignore the magnetic-field connection altogether.