2.1.2 Potential Difference (Voltage)

• What is potential difference often referred to as?

  Voltage
• Potential difference is the amount of energy transferred per unit charge
• What unit is potential difference measured in?

  Volts (V)
• The formula for potential difference is $V =$$\frac{E}{Q}$
• In the formula $V =$$\frac{E}{Q}$, $E$ represents energy transferred in joules
• Match the quantity with its unit and formula:

  Potential Difference ↔️ Volts (V) ||| $V =$$\frac{E}{Q}$

  Energy Transferred ↔️ Joules (J) ||| $E =$$V \times Q$

  Charge ↔️ Coulombs (C) ||| $Q =$$\frac{E}{V}$
• Voltage is the energy transferred per unit charge between two points in a circuit.
• The relationship between potential difference, energy transferred, and charge is expressed by the formula V = \frac{E}{Q}
• What does $V$ represent in the formula $V =$$\frac{E}{Q}$?


  Potential difference
• Energy transferred is measured in joules
• What is the unit for potential difference?

  Volts (V)
• Potential difference is measured in coulombs.

  False
• What formula relates potential difference, energy transferred, and charge?

  $V =$$\frac{E}{Q}$
• In the formula V = \frac{E}{Q}</latex>, $Q$ represents charge
• What is the symbol for charge?

  $Q$
• Potential difference is the energy transferred per unit charge between two points in a circuit.
• What is the role of potential difference in circuits?

  Energy transfer
• The relationship between potential difference, energy transferred, and charge is expressed by the formula V = \frac{E}{Q}
• If 20 joules of energy are transferred by 4 coulombs of charge, what is the potential difference?

  $5 \text{ V}$
• A voltmeter is connected in parallel to measure potential difference.
• How is a voltmeter connected in a circuit to measure potential difference across a resistor?

  In parallel
• The relationship between potential difference, energy transferred, and charge is expressed by the formula V = \frac{E}{Q}
• What is the unit for potential difference?

  Volts (V)
• What is the symbol for energy transferred?

  $E$
• Potential difference is measured in volts
• Potential difference is the energy transferred per unit charge between two points in a circuit.
• What is potential difference also known as?

  Voltage
• Potential difference is the amount of energy transferred per unit charge
• What unit is used to measure potential difference?

  Volts
• If 20 joules of energy are transferred by 4 coulombs of charge, the potential difference is 5 volts.
• What does potential difference drive in a circuit?

  Current
• In a series circuit, voltage is divided among the components
• What device is used to measure potential difference?

  Voltmeter
• Steps to measure potential difference using a voltmeter

  1️⃣ Connect the voltmeter in parallel

  2️⃣ Ensure correct polarity

  3️⃣ Read the potential difference
• Ohm's Law states that voltage is inversely proportional to current.

  False
• What unit is used to measure resistance?

  Ohms
• If a resistor has a resistance of 5 ohms and a current of 2 amperes, what is the potential difference across it?

  10 volts
• Match the relationship with its correct formula:

  Potential Difference ↔️ V = IR</latex>

  Current ↔️ $I =$$\frac{V}{R}$

  Resistance ↔️ $R =$$\frac{V}{I}$