1. In a simple circuit a 6-volt dry cell pushes charge through a single lamp which has a resistance of 3 Ω. According to Ohms law the current through the circuit is _____________ Amps.
2. If a second identical lamp is connected in series, the 6-volt battery must push a charge through a total resistance of ________ Ω. The current in the circuit is then __________ Amps.
3. If a third identical lamp is connected in series, the total resistance is now _________Ω.
4. The current through all three lamps in series is now _________ Amps. The current through each individual lamp is __________ Amps.
5. What is the power when a voltage of 120 volts drives a current of 3 amps through a device?
6. What is the current when a 90-W light bulb is connected to 120 V?
7. How much current does a 75-W light bulb draw when connected to 120 V?
8. If part of an electric circuit dissipates energy at 6 W when it draws a current of 3 A, what voltage is impressed across it?
9. If a 60 W light bulb at 120 V is left on in your house to prevent burglary, and the power company charges 10 cents per kilowatt-hour, how much will it cost to leave the bulb on for 30 days? Show your work
