1. A battery is charged using a current of 5.7 mA for 7 hours. How much charge passes through the battery?
2. What is the current if 1000 Na⁺ ions were to flow across a cell membrane in 6.5 s? (Hint: each individual sodium ion has the overall charge of a proton.)
3. How much current is produced from a 12 V battery when a 150 resistor is connected across the battery?
4. What voltage must a battery have to produce 0.5 A of current through a 2.0 resistor?
5. What current would you expect to find in an electrical device with a power rating of 5 W and 220 of resistance?
6. The wire in a house circuit is rated at 15 A and has a resistance of 0.15 . How much power is dissipated?
7. A current of 3.7 A is running through a circuit with a total resistance of 1.5 . What is the voltage supplied by the battery?
8. If the current in a circuit is 10 A and the resistance is 3 , what is the voltage supplied by the battery?
9. If the battery in a circuit supplies 24 V and the total resistance is 12 , what is the current through the wires?
10. What is the resistance of a 110 V appliance that draws 300 mA of current?
11. A 12 V car battery is connected to a headlight that has 3 of resistance. What is the current through the lamp?
12. What is the voltage, in V, across a 12 resistor that carries a 5 A current?