Which electrical characteristic describes voltage generation when a conductor is cut by lines of magnetic flux?

Which electrical characteristic describes voltage generation when a conductor is cut by lines of magnetic flux?

• A. Inductance
• B. Capacitance
• C. Effective Value
• D. Peak Voltage

Answer: (A)

Voltage generated when a conductor is cut by magnetic flux comes from electromagnetic induction. The property that describes how much voltage you get for a changing current is inductance. In a circuit with inductance, the induced voltage is proportional to how fast the current changes: V = L di/dt. Faraday’s law also states that the emf around a loop equals the negative rate of change of the magnetic flux, ε = -N dΦ/dt. The flux linked to a coil is tied to the current, so the inductance L can be thought of as the constant that relates flux linkage to current, and thus ε = -L dI/dt under linear conditions. Capacitance deals with energy stored in electric fields from charge separation, not with cutting magnetic flux. RMS (effective) value and peak voltage are just ways to express voltage magnitude, not the generation mechanism.

Voltage generated when a conductor is cut by magnetic flux comes from electromagnetic induction. The property that describes how much voltage you get for a changing current is inductance. In a circuit with inductance, the induced voltage is proportional to how fast the current changes: V = L di/dt. Faraday’s law also states that the emf around a loop equals the negative rate of change of the magnetic flux, ε = -N dΦ/dt. The flux linked to a coil is tied to the current, so the inductance L can be thought of as the constant that relates flux linkage to current, and thus ε = -L dI/dt under linear conditions. Capacitance deals with energy stored in electric fields from charge separation, not with cutting magnetic flux. RMS (effective) value and peak voltage are just ways to express voltage magnitude, not the generation mechanism.