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Electric Circuits

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Electric Circuits Answer Key

Complete the following statement:

If you increase the resistance in a series circuit,                               .
  1. the current will also increase
  2. the current will decrease
  3. the voltage will increase
  4. the voltage will decrease
Electric current is measured in                .
  1. amperes
  2. watts
  3. meters
  4. inches
Electrical power is expressed in watts.
  1. True
  2. False
A light bulb with resistance of 2 ohms is connected to a 4-V battery. What is the current flowing through the circuit?
  1. 0.5 A
  2. 5 A
  3. 2 A
  4. 1 A
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?
  1. 4 Volts
  2. 12 Volts
  3. 36 Volts
  4. None of the above
Look at the drawing. If the voltage is 6 volts and each resistor is 2 Ohms, what is the total resistance of the circuit?
Series Circuit
  1. 3 Ohms
  2. 0 Ohms
  3. 1 Ohm
  4. 6 Ohms
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
When you are at home, turning off a light usually does not turn off your T.V. This is because
  1. most electrical devices in a house are on parallel circuits.
  2. most electrical devices in a house are on series circuits.
  3. they have different sources of voltage.
  4. a T.V. does not require electricity.
An electric component that stores charge because it can accumulate electric charge when connected to power source is called a(n)                .
  1. resistor
  2. inductor
  3. capacitor
  4. switch
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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