7/24/2019 Phys196 Exam2 Cheatsheet.docx

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Physics 196 Cheat Sheet Exam 2

Equations

E =q

F E =r2

KqF =

r2Kq q

1 2 A = r2 F = ma K = mv221

U = Fd K i+ Ui= Kf+ UfU = r

Kq q1 2 V =

r

KqV = Ed

U = Vq V = IR F = Eq I =Lr2 I =

LA K = 1

40

V =C

QCparallel= C1+ C2+ Cn E = J = I

A C =d

A0

Cseries= ( + + + )-11

C1

1C

2

1Cn

=1 df= at

2+ vit +21

di vf= at + vi a = tvvf i

Vd=J

N eeVd=

IAn ee

J =

IA

U = qEd V =q

F d ie= neAVd t = EemVd I = eie Q = It

Variables

E = electric field (N/C or V/m) F = Force (N) A = area (m2)

K = Kinetic Energy (J) U = potential Energy (J) v = velocity (m/s)

V = change in voltage or potential difference (V)V = voltage (V) q = Q = charge (C) d = distance (m) L = length

(m)

I = current (A or C/s) R = resistance (ohms)

= resistivity Vd= drift speed (m/s) vf= final velocity (m/s)

vi= initial velocity (m/s) J = current density (A/m2)

= conductivity ne = number of electrons e = charge of electron

C = capacitance (F) Cparallel = capacitance in parallel

Cseries= capacitance in series m = mass (Kg) t = time (s)

7/24/2019 Phys196 Exam2 Cheatsheet.docx

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Unit Conversions

Cent- X 10-2 mill- X 10-3 micro- X 10-6 nano- X 10-9

pico- X10-12

Constants

K = 8.99 X 109 0 = 8.85 X 10-12

mass of electron = 9.12 X 10-31Kg mass of proton = 1.67 X 10-27Kg

charge of proton = 1.602 X 10-19C

charge of electron = -1.602 X 10

-19

C for carbon = 1.00 X 10-8 for silver = 1.59 X 10-8

for copper = 1.68 X 10-8 for gold = 2.44 X 10-8

for aluminum = 2.82 X 10-8 for iron = 1.0 X 10-7

for lead = 2.20 X 10-7 for titanium = 4.20 X 10-7