# Shared Flashcard Set

## Details

Electromagnetic Induction
N/A
8
Physics
05/07/2011

Term
 ElectroMotive Force (emf)
Definition
 Pottential difference resulting from a conductor moving through a magnetic field is referred to as emf.
Term
 Induced emf/current How is it induced? Definition, & unit
Definition
 Emf is induced(produced) in a wire if there is a relative motion between the wire and a magnetic field. Which can happen: 1. If the wire/coil moves 2. if the magnet or electromagnet moves 3. if the electromagnet is switched on or off or is alternating. Definition: The induced emf is the amount of mechanical energy converted into electrical energy per unit charge. Unit: Volt
Term
 Magnetic Flux Φ Definition what affects it? when is it maximum?
Definition
 Measure of the amount of field lines passing through an area, at right angles to the area. Can be changed by area or flux density (field strength). It is maximum when field lines are at right angles to area.
Term
 Magnetic Flux Φ formula unit
Definition
 B=magnetic field strength -(T-tesla)Θ=angle between flux and line normal to area. Φ=BAcosΘUnit: The weber(Wb) 1 Wb=1Tm2
Term
 Magnetic Flux Linkage definiton + equation what affects it? unit
Definition
 Measure of the number of turns of wire "linked" (passing through) magnetic flux. N×Φ Can be increased by: 1. increasing magnetic flux. 2. number of turns of wire. Same as magnetic flux, Wb, or Tm2
Term