Physics 1B
Thermal Physics & Electromagnetism
H. E. Smith Spring 2000
Physics 1B - Reading Quiz #8
When the switch is closed in Circuit A above; what happens in the resistor in Circuit B?
A. a momentary current flows from left to right.
B. a constant current flows from left to right as long as the switch is closed.
C. a momentary current flows from right to left.
D. a constant current flows from right to left as long as the switch is closed.
E. nothing.
It is desirable to transmit electrical energy at high voltage because
A. DC power, which is the easiest means of generating power, naturally favors high voltage.
B. resistive power losses, P=I
2
R, will be minimized.
C. power transmitted, P=I
2
R, will be maximized.
D. high voltage is desirable for household electrical circuits.
E. it is important to get power lines as high above the ground as possible, thus high voltage is required.
