# Electric Circuits

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## Electric Circuits Answer Key

1.

Complete the following statement:

If you increase the resistance in a series circuit, .

If you increase the resistance in a series circuit, .

- the current will also increase
- the current will decrease
- the voltage will increase
- the voltage will decrease

2.

Electric current is measured in .

- amperes
- watts
- meters
- inches

3.

Electrical power is expressed in watts.

- True
- False

4.

A light bulb with resistance of 2 ohms is connected to a 4-V battery. What is the current flowing through the circuit?

- 0.5 A
- 5 A
- 2 A
- 1 A

5.

Meg creates a circuit with a 12 volt battery. It is a parallel circuit with 3 branches and each branch has a 3 Ohm resistor. How much voltage will be delivered on each branch?

- 4 Volts
- 12 Volts
- 36 Volts
- None of the above

6.

Look at the drawing. If the voltage is 6 volts and each resistor is 2 Ohms, what is the total resistance of the circuit?

- 3 Ohms
- 0 Ohms
- 1 Ohm
- 6 Ohms

7.

Describe the difference between a series circuit and a parallel circuit.

- series - single pathway for charge flow

parallel - charges have more than 1 pathway to flow

8.

When you are at home, turning off a light usually does not turn off your T.V. This is because

- most electrical devices in a house are on parallel circuits.
- most electrical devices in a house are on series circuits.
- they have different sources of voltage.
- a T.V. does not require electricity.

9.

An electric component that stores charge because it can accumulate electric charge when connected to power source is called a(n) .

- resistor
- inductor
- capacitor
- switch

10.

What is the relationship explained by Ohm's Law?

- The current through a conductor between two points is directly proportional to the potential difference across the two points.

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