California Polytechnic State University
Instructor: Dr. Benzahra
PHY 1520 Challenging Problem
Two charged plates stand vertical and face each other. The magnitude of the surface
charge density on each plate doesn’t change and has a value of 3.2 ⇥ 10 7 C/m2 , and
the plates are 2.1 cm apart. (a) If a proton is released from rest near the positively
charged plate, with what speed will it hit the negatively charged plate? (b) If we
drill a hole in the negative plate and the proton comes out through that hole and
encounters a 3 T magnetic field that is perpendicular to the velocity of the proton,
find the magnetic field generated by the proton.
0 3.2 18 Elms
d 2.1cm
t
I
refine
a E CU
C
0 3.814 10 mIs
Eof
e OH
OH Eg V
vet
t.mg t
tt U
759.3 K
e Imrl
q2afr
1
b
I
ai O
r
B
B
3T
YE
MER
i A ne ra
i
Tu neVa
B Magnet
P METTE
B
TEE
ytem
t
B 5.474 no T