PHYS 222 –Spring 2012 – Quiz # 3
Closed books, notes, etc. No electronic device except a calculator.
NAME:
(18/ 100 points)
1. The charge flowing through a light bulb attached to a 12.0-V battery in 14.0 s is 30.0 C. What is the
total energy delivered to the filament during this process?
a. 12.0 J
b. 360 J
c. 5040 J
d. 168 J
(18/ 100 points)
2. The charge flowing through a light bulb attached to a 12.0-V battery in 14.0 s is 30.0 C. What is the
average power supplied by the battery during this process?
a. 360 W
b. 12.0 W
c. 25.7 W
d. 5.63 W
(16/ 100 points)
3. If a 500-W heater carries a current of 4.00 A, what is the voltage across the ends of the heating
element?
a. 2 000 V
b. 125 V
c. 250 V
d. 0.008 V
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(16/ 100 points)
4. If a 500-W heater carries a current of 4.00 A, what is the resistance of the heating element?
a. 85.7
b. 42.8
c. 31.3
d. 11.2
(16/ 100 points)
5. A 500-W heater carries a current of 4.0 A. How much does it cost to operate the heater for 30 min if
electrical energy costs 6.0 cents per kWh?
a. 1.5 cents
b. 9.0 cents
c. 18 cents
d. 36 cents
(16/ 100 points)
6. A 60-W light bulb is in a socket supplied with 120 V. What is the current in the bulb?
a. 0.50 A
b. 2.0 A
c. 60 A
d. 7 200 A
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