RL RC Circuits Flashcards
What is inductance?
The property of an electric circuit that opposes any change in current in that circuit
Doubling the number of turns doubles the number of flux lines linking the coil
True
Increasing the cross sectional area of any inductors core by two times, will increase the inductions by four times
False
Will increase by two times
What is the formula for finding tau in an RL circuit?
t=L/R
In an RL circuit, time taken to reach steady state current is ______ proportional to the inductance and ______ proportionally to the resistance
directly, inversely
Where is the energy received from the source by the inductor stored?
In the magnetic field surrounding the inductor
What are two methods of providing a path to safely discharge an inductor on opening an RL circuit?
Field discharge resistor, freewheeling diode
the electric force between two point electric charges is ___________ proportional to the production of the two charges and ____________ proportional to the square of the spacing between them
Directly, inversely
Define electrostatic induction
Two equal but opposite charges are caused without electrical contact
What is a dielectric?
Anytime an insulator is exposed to an electric field
What is the working voltage?
The maximum usable DC voltage beyond which damage to the dielectric results
What three factors affect the capacitor?
The capacitance of a capacitor is directly proportional to the plate area
The capacitance is inversely proportional to the spacing between the plates
The capacitance depends on the type of dielectric between the plates
Which type of fixed capacitor is polarity sensitive?
Electrolytic capacitors
