Questions

1. A simple circuit has a battery, a resistor and connecting wires. Sketch a simple circuit with these three things. Show the + and - side of the battery and the direction the current flows.

1. Describe the two ways of increasing the current through a device that obeys ohm's law.

1. If the voltage across a circuit is kept constant and the resistance is doubled, what happens to the current?

Problems

1. What is the voltage from a battery if it produces a 0.4 A current through a 60 ohm resistor?

1. What voltage causes a 1.5 A current in a 4 ohm resistor?

1. What voltage is across a 15 ohm device when 8 A of current are going through it?

1. A 75 V source is used in a circuit with 15 ohms of resistance. What is the current in the circuit?

1. A 20 ohm resistor is connected to a 30 V battery. What is the current through the resistor?

1. A 12 V battery produces a current of 0.024 A. This same resistor is then connected to a 36 V battery, what is the new current?