1. Consider the DC circuit shown below in which the surface charges on the wires and the direction of the current within them are shown.
P
V
I
I
Q
R
[10 exam points up to 70%]
A. At the point labeled P, in what direction does the Poynting vector point?
a) outward from the wire
b) inward toward the wire
c) leftward
d) rightward
e) out of the page
f) into the page
[10 exam points up to 70%]
B. At the point labeled Q, in what direction does the Poynting vector point?
a) outward from the wire
b) inward toward the wire
c) leftward
d) rightward
e) out of the page
f) into the page
[10 exam points up to 70%]
C. How does this circuit cause electrical energy to flow?
a) from the battery to the resistor half of the time, not at all half of the time
b) from the battery to the resistor half of the time, the reverse half of the time
c) always from the battery to the resistor
d) always from the resistor to the battery
e) there is no flow
