The average magnetic field inside a flat coil of area A with N turns around which a current i flows is approximately B=Nu0í/2√A/π. (a) Determine an expression for the flux through the coil when a current i flows. (b) Determine an expression for the coil’s inductance. (c) If the current through a coil of area 45 cm² with 20 turns decreases from 4.0 A to 2.5 A in 0.030s, calculate the induced emf in the coil.
The average magnetic field inside a flat coil of area A with N turns around which a current i flows is approximately B=Nu0í/2√A/π. (a) Determine an expression for the flux through the coil when a current i flows. (b) Determine an expression for the coil’s inductance. (c) If the current through a coil of area 45 cm² with 20 turns decreases from 4.0 A to 2.5 A in 0.030s, calculate the induced emf in the coil.
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter23: Faraday’s Law And Inductance
Section: Chapter Questions
Problem 1P
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The average magnetic field inside a flat coil of area A with N turns around which a current i flows is approximately B=Nu0í/2√A/π. (a) Determine an expression for the flux through the coil when a current i flows. (b) Determine an expression for the coil’s inductance. (c) If the current through a coil of area 45 cm² with 20 turns decreases from 4.0 A to 2.5 A in 0.030s, calculate the induced emf in the coil.
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