A very long conducting tube (hollow cylinder) has inner radius
a
a
and outer radius
b
b
. It carries charge per unit length
−α
−α
where
α
α
is a positive constant with units of
C/m
C/m
. A line of charge lies along the axis of the tube. The line of charge has charge per unit length
+α
+α

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.