Self Inductance

Question 1

Magnetuc flux in self inductance=?

Answer 1

φ=(μn^2Al)i =Li
L=μn^2Al

Question 2

Faraday’s law emf?

Answer 2

emf=-Ldi/dt
|emf|=Ldi/dt

Question 3

Graph of L vs l when n is constant?

Answer 3

L is directly proportional to l

Question 4

Graph of L vs l when N is costant?

Answer 4

L is inversely proportional to l

Question 5

Energy stored in inductor?
Magnetic Energy density?

Answer 5

E=1/2 Li^2
Mag. energy density = B^2/2μ
E= B^2Al/2μ

Question 6

current and charge at time t in charging of inductor?

Answer 6

I=Imax(1-e^-tR/L)
Q=Qmax (1-e^-t/RC)

Question 7

Current and charge at time t in dischaging of inductor?
and Energy lost?

Answer 7

I=Imax e^-tR2/L
Q=Qmaxe^-t/RC
Energy lost across R2 E=1/2 L(E/R1)^2