Inductors and Capacitors in Circuits 030201c Flashcards
What happens to current in a purely resistive circuit?
Instantly rises its steady value/max.
What happens to current when voltage is applied to an inductive circuit?
It rises at a rate that is determined by the inductance of the circuit. Not instant.
What does T stand for in inductive circuits?
T represents 1 time constant measured in seconds.
What is the equation for T when given L(Inductance) and R(Resistance)?
T = L/R
How much does current rise after each time constant?
63.2% each time constant.
What is the purpose of a discharge resistor?
Reduces arcing at the switch when the circuit is opened.
What happens when an inductive circuit is opened?
The collapsing magnetic field can induce a very high voltage into the circuit.
What is capacitance?
Is the property of a capacitor that allows it to store an electric charge.
What is capacitance(C) measured in and what is the symbol for the unit of measurement?
Farad (F)
What are are the two equations to calculate Q(Charge)?
Q = I x T
Q = C x V
