Introduction to Physics
TitleChapter 6 Homework (weeks 12 & 13)
DetailsChapter 6, Group B:
Problems: 1, 2, 3, 5, 6, 8, 9, 10, 11, and 12.
1.An inflated rubber balloon is rubbed with a wool cloth until an excess of a billion electrons is on the balloon. What is the magnitude of the charge on the balloon?
2.What is the force between two balloons with a negative charge of 1.6 X 10˄-10 C if the balloons are 5.0 cm apart?
3.How much energy is available from a 12 V storage battery that can transfer a total charge equivalent to 100,000 C?
5.What is the magnitude of the least possible current that could theoretically exist?
6.There is a current of 0.83 A through a lightbulb in a 120 V circuit. What is the resistance of this lightbulb?
8.A 10.0 Ω lightbulb is connected to a 12.0 V battery.
a.What current flows through the bulb?
b.What is the power of the bulb?
9.A lightbulb designed to operate in a 120.0 V circuit has a resistance of 192 Ω. At what rate does the bulb use electric energy?
10.What is the monthly energy cost of leaving a 60 W bulb on continuously if electricity costs $0.10 per kWh?
11.An electric motor draws a current o 11.5 A in a 240 V circuit. What is the power of this motor in W?
12.A swimming pool requiring a 2.0 hp motor to filter and circulate the water runs for 18 hours a day. What is the monthly electrical cost for running this pool pump if electricity costs $0.10 per kWh?