Physics 1B
Quiz 5 6/8/2012
Directions: Use pencil only. On your Scantron, you should have already blackened in your Student ID,
using “1” for “A”, “7” for “U”, making a 9-digit number (for shame if you haven’t). Fill in x in the Test
Form box. Choose the one best answer. Questions may include more or less information than is needed, so
sometimes the answer is “not enough information.” Pay close attention to the units of given numbers.
You may find some of the following useful:
G  6.67  1011 N-m 2 kg 2
g  9.8 m/s 2
ke  8.99  109 N-m 2 C2
proton charge  1.6  1019 C
surface area of a sphere  4 r 2
4
volume of a sphere   r 3
3
x f  xi  vi t  at 2 / 2
Fe  ke
E  ke
q
 ri 2i rˆi
q1q2
r2
electron mass  9.11  10 31 kg
U

Q
 E  E A  4 ke qin 
B
A
V (r )  k e
E  dr
Rtot  R1  R2
1
1
1


Rtot R1 R2
P   V  I
V  IR
I ds  rˆ
Fm  I l  B
dB(at P)  km
Fm  qv  B
Ftotal  q  E  v  B 
B 
area BdA
r2
  V  
,
d B
dt
q
r
1
4 0
E  Fe / q0
rˆ12
i
V 
ke 
C
qin
0
Q 0 A

V
d
Ctot  C1  C2
1
1 Q2
2
U  C  V  
2
2 C
1
1
1


Ctot C1 C2
km  107 T-m/A,
x  y  x y sin 
0  4  107 T-m/A
 around B  ds  0 Ithrough
V  Bv