P3.2 Simple Circuits

• What are the three key electrical quantities in a simple circuit?

  Voltage, current, resistance
• Match the circuit component with its description:

  Power source ↔️ Provides electrical energy

  Conductor ↔️ Allows current to flow

  Switch ↔️ Controls current flow

  Load ↔️ Uses electrical energy
• Arrange the steps in describing how a simple circuit functions:

  1️⃣ Power source provides energy

  2️⃣ Conductors allow current flow

  3️⃣ Switch controls current flow

  4️⃣ Load uses electrical energy
• When the switch in a simple circuit is open, no current can flow.


  True
• What is the unit of measurement for voltage?

  Volts
• What is the function of a power source in a circuit?

  Provides electrical energy
• What does a load in a circuit use electrical energy for?

  To perform work
• A closed loop is necessary for current to flow in a circuit.


  True
• Match the electrical quantity with its description:

  Voltage ↔️ Potential difference

  Current ↔️ Rate of charge flow

  Resistance ↔️ Opposition to current
• Resistance opposes the flow of electric current.


  True
• Ohm's Law can be used to calculate voltage, current, or resistance if two of the quantities are known.

  True
• If a 12V battery is connected to a 6Ω resistor, what is the current flowing through the resistor?

  $2A$
• What happens to the total current in a parallel circuit?

  It is divided
• Ohm's Law states that voltage equals current times resistance.


  True
• What type of loop is required for electric current to flow in a simple circuit?

  Closed loop
• Match the electrical quantity with its description:

  Voltage ↔️ Electrical potential difference

  Current ↔️ Rate of flow of charge

  Resistance ↔️ Opposition to current
• The power source in a simple circuit provides electrical energy to the circuit.
• A conductor allows the flow of electric current
• The components of a simple circuit are connected in a closed loop
• Describe the flow of current in a simple circuit when the switch is closed.

  1️⃣ Power source provides energy

  2️⃣ Current flows through conductors

  3️⃣ Current passes through the load
• What unit is voltage measured in?

  Volts (V)
• What is the electrical potential difference that drives the flow of current called?

  Voltage
• What is the formula for Ohm's Law?

  $V =$$IR$
• In a series circuit, the same current flows through all components
• Match the type of circuit with its feature:

  Series ↔️ Same current through all components

  Parallel ↔️ Same voltage across all components
• What is the total resistance in a series circuit equal to?

  Sum of individual resistances
• What is the total resistance of three resistors with values 2Ω, 3Ω, and 5Ω connected in series?

  10Ω
• What is the total resistance of three resistors with values 2Ω, 3Ω, and 5Ω connected in series?

  $10Ω$
• In a series circuit, the formula for total resistance is R_{total} = R₁ + R₂ + R₃ + ...
• The total resistance in a parallel circuit is always less than the smallest individual resistance.


  True
• What is the function of a power source in a simple circuit?

  Provides electrical energy
• Match the electrical quantity with its description:

  Voltage ↔️ Electrical potential difference

  Current ↔️ Rate of flow of charge

  Resistance ↔️ Opposition to current
• According to Ohm's Law, if you know the voltage and resistance, you can calculate the current using the formula I = V/R.
• If voltage and resistance are given, the formula to calculate current is I = V/R
• In a parallel circuit, the voltage is the same across all components.


  True
• In a parallel circuit, the total resistance is always less than the smallest individual resistance.

  True
• In a parallel circuit, the total voltage is the same across all components
• What is the total resistance of three resistors with values 2Ω, 3Ω, and 5Ω connected in parallel?

  0.97Ω
• A conductor in a simple circuit allows the flow of electric current.


  True
• What is the purpose of a load in a simple circuit?

  Uses electrical energy