Transformers Flashcards
(10 cards)
1
Q
Faradays law
A
-Ndphi/dt=emf
2
Q
Transformer equation
A
Vs/Vp=Ns/Np
3
Q
Why are transformers only used in AC? What’s the voltage when you use DC?
A
0v As you have 0 changing flux. If the voltage is fixed then there’s no change in flux
4
Q
An inductor is
A
A solenoid
5
Q
What is the units of this and what is it also equivalent to? Phim/I
A
(u0N^2A)/L
In terms of Henry’s
6
Q
DvL=
A
-L(dI/dt)
7
Q
Volts/Henry=
A
Amps/s
8
Q
Initially, what’s the current flow thru a inductor
A
0
9
Q
After a long time has passed, what’s the current flow through a inductor?
A
As if it were a wire
10
Q
Whats the potential energy of an inductor
A
UL=(1/2)LI^2
