PHYS 202 General Physics

is connected across the terminals of the battery, the voltage drop across the resistor is found
to be 25.5 V. Determine the internal resistance of the battery. Predict what the voltage
between the battery terminals would be if we hooked a 40- Ωresistor between the terminals.
7. Why can a bird sit on a high-voltage power line and not be shocked
8. Here is drawn a circuit involving a battery and a light bulb. What will happen if we “ground”
a terminal of the light bulb by hooking to a metal pipe stuck in the ground Explain.
PIPE
9. Consider the circuit below. When the resistance of the nichrome wire is decreased, what
happens to the brightness of each bulb Explain why this happens, using concepts of both
current and voltage.
A
+
-
3 V
B
Nichrome
wire
10. In the circuit shown below, the voltage across the 30- Ω resistor is 2.40 volts. Find the battery
voltage without calculating any currents.
10 Ω
+
V =
-
30 Ω
60 Ω
5 Ω
#1: (A) 0.5 A (B) 1.0 V (C) 2.5 W (D) 3.0 W
#2: 24.5 Ω
#3: $4.38
#4: 4.4 Ω, 2.8 A
#5: 3 Ω
#6: 11.8 Ω, 21.6 V
#9: 4.20 volts