Series and Parallel Circuits

As the number of resistors in a series circuit increases, the overall resistance _____ and the current in the circuit __________ .

• increases, increases

• increases, decreases

• decreases, decreases

• decreases, increases

Three identical light bulbs are connected to a D-cell as shown at the right. Which one of the following statements is true?

• The bulb between X and Y will be the brightest.

• The bulb between Y and Z will be the brightest.

• All three bulbs will have the same brightness.

• The bulb between Z and the battery will be the brightest.

Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series. (input the value/number only)

A 10 ohm, 20 ohm, and 100 ohm resistors are connected in parallel. Calculate the total resistance. (write only the value/number)

Determine the unknown R, resistor, in this series circuit.

• 100 ohms

• 25 ohms

• 240 ohms

• 190 ohms

The diagram to the left represents an electric circuit consisting of four resistors and a 12-volt battery. What is the current measured by ammeter A shown in the diagram? (write only the value/number)