Induction Faraday's Law of Physics

10.1 Faraday's Law of Induction

Faraday's law of induction states that the motion of electrically induced voltage ε in a circuit is the same (except the negative sign) with the speed of change of flux through the circuit. If the rate of change of flux is expressed in the weber / second, then the motion of electric voltage ε be expressed in volts.

In the form of equation

This is the Faraday induction law.

If there are N loops, then equation (10.1) can be written:

Faraday's Law states that
  "A straight wire along the l
  moving with velocity v perpendicular
  to a magnetic field B will get
  emf induced between the two ends of:

Law 10.2 Lenz

Lenz's law states that:
"Flow-induced will appear in the direction such that the direction is against the changes that produce it."
A copper rod of length L rotating at angular frequency ω in a magnetic field B as shown in the figure below. Find the motion of electric voltage ε developed between the two ends of the stick.

10.3 field-magnetic field that changes with time
A magnetic field changes will generate an electric field. Faraday induction law becomes:

 Let B in the figure below ertambah with speed dB / dt. And R is the radius of the cylinder is considered to have a magnetic field. What is the magnitude of the electric field E at a radius r? Suppose that the dB / dt = 0.10 T / s, r = 5 cm and R = 10 cm.

                                                                             For r <R
                                                                             For r> R