What does N represent in Faraday's law V = -N ΔΦB/Δt?

What does N represent in Faraday's law V = -N ΔΦB/Δt?

• A. Magnetic field strength
• B. Number of turns in the coil
• C. Resistance
• D. Capacitance

Answer: (B)

In Faraday's law, the induced voltage is tied to how quickly the magnetic flux through a loop changes. When a coil has N turns, the flux change links through every turn, so the voltages from all turns add together. That gives emf = -N dΦB/dt. So N represents the number of turns in the coil (how many loops the magnetic flux passes through). More turns means a greater induced voltage for the same rate of flux change, since the effects from each turn accumulate. If there’s just one turn, you recover the basic single-loop form. The minus sign reflects Lenz's law—the induced voltage opposes the change in flux.

In Faraday's law, the induced voltage is tied to how quickly the magnetic flux through a loop changes. When a coil has N turns, the flux change links through every turn, so the voltages from all turns add together. That gives emf = -N dΦB/dt. So N represents the number of turns in the coil (how many loops the magnetic flux passes through). More turns means a greater induced voltage for the same rate of flux change, since the effects from each turn accumulate. If there’s just one turn, you recover the basic single-loop form. The minus sign reflects Lenz's law—the induced voltage opposes the change in flux.