Properties Of Inducotrs And Capacitors Flashcards
What is a inductor
It’s an electrical component that stores energy in its electromagnetic field
The core problem f the coil may be composed of?
Non magnetic material such as air ceramic or plastic
A magnetic material like iron
What’s an another name for inductor?
Coil, or an solenoid or an reactor
Various types of electrical equipment use coils
Motors,transformers, solenoids, relays coils, magnetic starter coils , electromagnetic lighting ballasts
Line reactors for vfd
Induction
Where voltage is produced by the relative motion between a conductor and magnetic field
Inductance
The property of a cat that opposes change in current
The rate of change of flux in an alternator is affected by three factors?
The rotational frequency
The flux density
The angle of cut
Two types of induction are
Mutual and self induction
What is mutual induction
Generation of an emf in one conductor or cct by a change of flux around a separate conductor or cct
Self induction
Generation of emf in a conductor or cct by a Change of flux density around the conductor or cct
Define lenz laws
The polarity of any induced voltage must be such that any current resulting from it develops a flux that opposes any change in the orginal flux
What are the two factors that’s effect counter emf
The inductance of the coil
The rate of change of current
What’s the formula for inductance
L=n2 u A/ l
Capacitors what is it
Two plates of conductors material separated by a narrow gap or space
What are two types of compactor
Non polarized ac or dc
Polarized only dc
What are the six types of non polarized
Air-old dial type radio
Oil-filled high value of current and voltage
Paper(tubular) waxed paper two sheets alu or metallic foil
Plastic film
Mica
Ceramic (disc
What is the symbol unit of measurement and formula
Symbols C coulomb C
Unit of measurement is farads (F)
Formula is C=kA/d
Dielectric constant
Dielectric insulating material ability to polarized and store a charge
Dielectric strength
Measured in kilovolts per millimeter Kv/mm
Strong insulating
