1. There are three 20 ohm resistors connected in series and plugged into a 120 V outlet.
   1. What is the total resistance of the circuit?
   2. How much current goes through the circuit?
   3. What is the voltage across each resistor?
   4. What is the power of each resistor?

1. A 10 ohm, 15 ohm, and a 5 ohm resistor are connected in series across a 90 V battery.
   1. What is the total resistance of the circuit?
   2. How much current goes through the circuit?
   3. What is the voltage across each resistor?
   4. What is the power of each resistor?

1. A 9 V battery is in a circuit with three devices in series.
   1. If one of the devices is replaced by a device with greater resistance, what happens to the total resistance of the circuit?
   2. What will happen to the current in the circuit?
   3. What will happen to the voltage of the battery?
   4. What will happen to the voltage of the two remaining devices? (increase or decrease)

1. A string of Christmas lights has ten bulbs wired in series. Each bulb is the same. The string of lights is plugged into a 120 V outlet and the current through the circuit is 0.06A.
   1. What is the total resistance of the string of lights?
   2. What is the resistance of an individual bulb?
   3. How much voltage is across each individual bulb?
   4. What is the power of each bulb?
   5. What will happen if the 7^th bulb in the series burns out?

1. A 20 and 30 ohm resistor are connected in series and placed across a 100 V power supply.
   1. What is the total resistance of the circuit?
   2. How much current goes through the circuit?
   3. What is the voltage across each resistor?
   4. What is the power of each resistor?

1. Two devices are wired into a series. The circuit has 4 amps going through it and is plugged into a 120 V outlet.
   1. What is the total resistance of the circuit?
   2. If one of the devices is 10 ohms, what is the resistance of the other?
   3. What is the voltage across each resistor?
   4. What is the power of each resistor?