11.2 Electric Circuits

• What is an electric circuit defined as?

  Closed loop path
• What is an example of an electrical device that consumes energy in a circuit?

  Light bulb
• A voltage source in a basic circuit provides energy
• A closed-loop circuit allows current to flow continuously.


  True
• What is another term for voltage in an electric circuit?

  Potential difference
• The unit of current is the ampere.


  True
• The unit of resistance is the ohm
• A voltage source provides energy to the circuit
• The voltage source provides the energy needed to drive current through the circuit.
• Voltage, also known as potential difference, is the force that drives electric current to flow.
• The unit of current is the ampere
• A voltage source in a circuit provides energy
• A circuit must be closed to allow uninterrupted current flow.

  True
• Copper wires are commonly used as conductive wires in circuits.


  True
• An electrical device in a circuit can either consume or store energy
• The unit of voltage is the volt
• What is the measure of opposition to current flow in a circuit?

  Resistance
• Higher resistance in a circuit results in less current flow under the same voltage.


  True
• A closed loop is necessary for uninterrupted current flow in a circuit.

  True
• Conductive wires in a basic electric circuit are typically made of copper
• The unit of voltage is the volt
• Match the aspect of current with its analogy in water flow:

  Definition ↔️ Rate of flow of water

  Unit ↔️ Liters per second
• Higher resistance in a circuit results in less current flow under the same voltage.

  True
• In a series circuit, components are connected in a single continuous path
• How is total resistance calculated in a series circuit?

  Sum of individual resistances
• What is the total resistance in a series circuit with resistors of 10Ω and 20Ω?

  30Ω
• What is the voltage across a 20Ω resistor in the example circuit?

  20V
• In a parallel circuit, each branch experiences the same voltage.


  True
• In a parallel circuit, the voltage is the same across all branches
• Match the component with its function in an electric circuit:

  Voltage Source ↔️ Provides energy to drive current

  Conductive Wires ↔️ Carry current from source to devices

  Electrical Devices ↔️ Use or store energy
• What is voltage also called?

  Potential difference
• What is resistance measured in?

  Ohms (Ω)
• High resistance reduces current, while low resistance allows more current to flow under the same voltage.
• Resistance is the measure of opposition to current flow in a circuit.
• Match the property with its unit:

  Resistance ↔️ Ohm (Ω)

  Voltage ↔️ Volt (V)

  Current ↔️ Ampere (A)
• If the voltage in a circuit is 12V and the resistance is 4Ω, the current is 3A.


  True
• In a series circuit, the total resistance is the sum of individual resistances.
• What happens to the total resistance when resistors are added in parallel?

  It decreases
• What formula is used to calculate the total current in a combined circuit?

  $I_{total} =$$\frac{V_{source}}{R_{total}}$
• To combine resistors in parallel, the reciprocal of the total resistance is equal to the sum of the reciprocals of individual resistances