1. A 12.0 V storage battery is connected to three resistors, , respectively. The resistors are joined in series.

a. Calculate the equivalent resistance.

b. What is the current in the circuit?

2. A resistor, and resistor, and a resistor are connected in series with a 24.0 V battery.

a. Calculate the equivalent resistance.

b. Calculate the current in the circuit.

c. What is the current in each resistor?

This is a series circuit, so the current through each resistor is 1 A.

3. Because the current in the equivalent resistor of Sample Problem 20A is 0.50 A, it must also be the current in each resistor of the original circuit. Find the potential difference across each resistor.

4. A series combination of two resistors, , is connected to a 9.00 V battery.

a. Calculate the equivalent resistance of the circuit and the current.

b. What is the potential difference across each resistor?

5. A resistor is connected in series with another resistor and a 4.5 V battery. The current in the circuit is 0.60 A. Calculate the value of the unknown resistance.

6. Several light bulbs are connected in series across a 115 V source of emf.

a. What is the equivalent resistance if the current in the circuit is 1.70 A?

b. If each light bulb has a resistance of 1.50 , how many light bulbs are in the circuit?