Inductance

self inductance Lmutual inductance M

1Lecture 10.5

2Lecture 10.5

3Lecture 10.5

4Lecture 10.5

Self and Mutual Inductances

/dABN

I/NμB   and   IBAN

IΦ

L

12

101

1 ===

l

l

λNNM  ;  λNL  ;  λNL

/INμB   and   I

ABNM

21222

211

11011

1221

===

== l

M2 = L1 L2

A0μλ5Lecture 10.5l

0μλ =

Lecture 10.5 6

Lecture 10.5 7

Lecture 10.5 8

needs a computer!… needs a computer!

Lecture 10.5 9

10Lecture 10.5

Quiz

For times t < 0, the switch is open, as shown. For times t ≥ 0 the switch is closed

Q

closed.(a) Determine the current I(t) around the circuit for t ≥ 0 .(b) Now suppose R = 10 Ω and L = 0.025 H C l l t th ti h I i 90% f it H. Calculate the time when I is 90% of its final value, I(t) = 0.9 E/R. Express the answer in milliseconds.

tter

y

uct

or

switch

bat

i t

ind

u

resistor

11Lecture 10.5