Study Guide for Test #2 Chapter 18 DC Circuits Chapter 19 Magnetism

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Study Guide for
Test #2


Chapter 1
8

DC Circuits

V=IR




R
series
= Σ R
i

R
parallel

= (Σ 1/R
i
)
-
1

Kirchoff’s Rules


(Σ I)
node

= 0


(Σ V)
loop
= 0

RC circuits


τ = RC


Chapter 1
9 Magnetism

F
B

= qvB sinθ

B units Tesla

Right hand rule for v, B, and F

F
B

= I

l

B sin

θ

τ = B

I

A sin

θ

Ampere’s law


Σ(B
parallel

Δl) = μ
o

I
enclosed

*
B
long straight wire

=

μ
o

I/ (2 π r)


*Vector direction

F/l = μ
o

I
1
I
2
/(2 π d)

B
loop

=

μ
o

I/ (2 R)

B
solenoid
=

μ
o

n I


n = N/l


Chapter
20

Induced Voltages and Inductance

Φ
B

= BA cos

θ

E

=
-
N ΔΦ
B
/

Δt

ΔV = Blv

E
generator

= N B A ω sin ωt

E

=
-
L ΔI/

Δt

L = N Φ
B
/ I