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1)An inflated rubber balloon is rubbed with a wool cloth until an excess of 1

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1)An inflated rubber balloon is rubbed with a wool cloth until an excess of 1.00 × 1010 electrons is on the balloon. What is the magnitude of the charge on the balloon?

2)What is the magnitude of the force between two balloons with a negative charge of 6.0 × 10−10 C if the balloons are 8.9 cm apart?

3)How much energy is available from a 24 V storage battery that can transfer a total charge equivalent to 270000 C?

1. A wire carries a current of 2.2 A. At what rate is the charge flowing?
2. What is the magnitude of the least possible current that could theoretically exist?
3. There is a current of 0.54 A through a lightbulb in a 120 V circuit. What is the resistance of this lightbulb?
4. What is the voltage across a 25.0 Ω resistor with a current of 2.20 amp?
5. A 12.0 Ω lightbulb is connected to a 15.0 V battery.
6. A lightbulb designed to operate in a 48.0 V circuit has a resistance of 145 Ω. At what rate does the bulb use electric energy?
7. What is the monthly (30 days) energy cost of leaving a 75-W bulb on continuously if electricity costs 16¢ per kWh?
8. Three pieces of amber are hung from threads, and then each is charged by rubbing piece A with fur, piece B with silk, and piece C with nylon. It is now observed that pieces A and B repel each other and that pieces B and C repel each other. What can you say about the charge of each piece?