2.1.2 Potential Difference (Voltage)

• What is potential difference (voltage)?

  Electrical potential energy difference
• Potential difference and current are the same concept.

  False
• What is the unit used to measure potential difference?

  Volt
• What is the formula for Ohm's law?

  $V =$$IR$
• Electrical potential is the electrical potential energy per unit of electric charge at a specific point.


  True
• Electrical potential focuses on a single point, while potential difference focuses between two points.
• Potential difference is the driving force that causes electrons to flow in a circuit.

  True
• What is Ohm's law expressed mathematically?

  $V =$$IR$
• Potential difference is measured in volts.


  True
• Voltage is the push that drives current.

  True
• Potential difference is the driving force that causes electric current to flow.
• Match the concept with its definition:

  Potential Difference ↔️ Electrical potential energy difference

  Current ↔️ Flow of electric charge
• The relationship between potential difference, current, and resistance is described by Ohm's law.
• Order the steps to describe the relationship between potential difference, current, and resistance in a circuit:

  1️⃣ Potential difference creates an electric field

  2️⃣ Electric field exerts a force on electrons

  3️⃣ Electrons move and flow as current
• What is the formula for electrical potential?

  $V =$$\frac{E}{q}$
• Match the concept with its focus:

  Electrical Potential ↔️ Single point

  Potential Difference ↔️ Between two points
• In what unit is potential difference measured?

  Volts
• If a 12V battery is connected to a 3Ω resistor, the current flowing through the resistor is 4 A.
• What does potential difference measure in a circuit?

  Electrical potential energy difference
• Potential difference is the electrical potential energy difference between two points in a circuit.
• Potential difference and current are inversely related.

  False
• Electrical potential is the energy per unit charge at a point.
• What is the driving force behind electric current in a circuit?

  Potential difference
• Match the concept with its definition and formula:

  Potential Difference ↔️ Electrical potential energy difference, $V =$$IR$

  Electric Current ↔️ Flow of electric charge, $I =$$\frac{V}{R}$

  Resistance ↔️ Opposition to current flow, $R =$$\frac{V}{I}$
• Potential difference is also known as voltage
• The relationship between potential difference, current, and resistance is described by Ohm's
• EMF is the total electrical energy available from a source
• EMF accounts for internal resistance
• Current is the flow of electric charge
• Electrical potential is the electrical potential energy per unit of electric charge
• Potential difference creates an electric field that pushes electrons.


  True
• Potential difference is measured in volts.


  True
• Potential difference is the electrical potential energy difference between two points in an electrical circuit
• Voltage pushes electrons to move through a circuit, creating current.

  True
• Potential difference drives the flow of electric charge in a circuit.


  True
• The formula for EMF is $E =$$V +$$Ir$.


  True
• EMF accounts for the internal resistance
• Match the voltage source with its common application:

  AA Batteries ↔️ Small electronics

  Car Battery ↔️ Starting a car

  Household Outlet ↔️ Powering appliances

  High-Voltage Power Lines ↔️ Transmitting electricity
• What is the unit of current?

  Ampere (A)
• What is electrical potential measured in?

  Volts (V)