# Motion  Current: Generating Electricity (Faraday’s law)

## Presentation on theme: "Motion  Current: Generating Electricity (Faraday’s law)"— Presentation transcript:

Motion  Current: Generating Electricity (Faraday’s law)
1. A current appears only if there is relative motion. Fast motion produces a greater current. 3. Clockwise/counter clockwise current with north pole move in/out. Opposite with south pole. Induced current in secondary coil, if there is change of current in the primary coil: switch or ac current Transformer

Magnetic flux through area A Amount of magnetic field passes through an area A For uniform B: (Weber, or Wb, or T m2 Faraday’s Law of Induction: An emf is induced in a loop when the magnetic flux that pass through the loop is changing. The the loop is conducting, then a current will flow. For a loop with N turns: Change B (change current) Change A Change angle between them

Current loop in magnetic field: Motors
B B F L w

Torque on a Current Loop: Motors
F F B F B B n n n F

Torque on a Current Loop: Continuous
B F n B F n B F n B F B F