11.6 Kirchhoff's Loop Rule

• The sum of voltage changes around a closed loop is zero
• The Kirchhoff's Loop Rule states that the sum of voltage changes around a closed loop is zero
• Steps to apply Kirchhoff's Loop Rule to a simple circuit:

  1️⃣ Identify circuit elements

  2️⃣ Determine voltage change across each element

  3️⃣ Organize voltage changes in a table

  4️⃣ Verify sum of voltage changes is zero
• The sum of voltage changes around a closed loop must always be zero.


  True
• What is the first step in applying Kirchhoff's Loop Rule to a simple circuit?

  Identify circuit elements
• What is the voltage change across a 12V battery in a circuit?

  +12V
• What is the primary focus of Kirchhoff's Loop Rule?

  Voltage changes
• Match the Kirchhoff's rule with its focus:

  Kirchhoff's Loop Rule ↔️ Voltage changes

  Kirchhoff's Junction Rule ↔️ Current flow
• Capacitors store and release energy affecting voltage over time.
• Steps to apply Kirchhoff's Loop Rule in a simple circuit:

  1️⃣ Identify circuit elements

  2️⃣ Determine voltage change across each element

  3️⃣ Organize changes in a table

  4️⃣ Ensure the sum of voltage changes is zero
• The sum of voltage changes around a closed loop is always zero according to Kirchhoff's Loop Rule.


  True
• What does Kirchhoff's Loop Rule validate when the sum of voltage changes is zero?

  Kirchhoff's Loop Rule
• Steps to solve for unknown quantities using Kirchhoff's Loop Rule

  1️⃣ Identify circuit elements

  2️⃣ Determine voltage changes

  3️⃣ Organize voltage changes in a table

  4️⃣ Apply Kirchhoff's Loop Rule
• The voltage change across a resistor is always a voltage drop.


  True
• To apply Kirchhoff's Loop Rule, the sum of voltage changes around the closed loop must equal zero.
• Batteries add voltage if traversed from negative to positive.
• What is the primary focus of Kirchhoff's Loop Rule?

  Voltage changes
• In a circuit with a 12V battery and resistors -4V and -8V, the total voltage change is 0V
• Match the Kirchhoff's Law with its definition:

  Loop Rule ↔️ Sum of voltage changes in a closed loop is zero

  Junction Rule ↔️ Sum of currents at a junction is zero
• What type of voltage change does a resistor typically cause?

  Voltage drop
• When the total voltage change in a loop is zero, it confirms the Loop Rule.

  True
• What type of voltage change does a battery typically cause in a circuit?

  Voltage increase
• Steps to apply Kirchhoff's Loop Rule to complex circuits

  1️⃣ Identify Loops

  2️⃣ Assign Currents

  3️⃣ Apply Loop Rule

  4️⃣ Set up Equations

  5️⃣ Solve Equations
• The sum of voltage changes around a loop is equal to zero.


  True
• In the two-loop circuit example, the second loop equation is 7Ω * (I1 - I2) - 8Ω * I2 = 0.
• Combining the Loop Rule with the Junction Rule allows us to solve complex circuits
• What does the Junction Rule state in the two-loop circuit example?

  I1 = I2 + I3
• The Loop Rule can be used to solve for unknown current or power in a circuit.

  True
• What does Kirchhoff's Loop Rule state about the sum of voltage changes around a closed loop?

  The sum is zero
• Match the Kirchhoff's rule with its focus:

  Loop Rule ↔️ Voltage changes

  Junction Rule ↔️ Current flow
• What is the definition of Kirchhoff's Loop Rule?

  Sum of voltage changes is zero
• Batteries add voltage to a circuit, while resistors cause a voltage drop
• Resistors cause a voltage drop, batteries add voltage, and capacitors store or release voltage
• The sum of the voltage changes around a closed loop must equal zero
• Kirchhoff's Loop Rule states that the sum of the voltage changes around a closed loop is zero.


  True
• Kirchhoff's Junction Rule focuses on the sum of currents entering a junction.
• Batteries always reduce voltage in a circuit.

  False
• What is the focus of Kirchhoff's Junction Rule?

  Current flow
• What is the first step in solving for unknown quantities using Kirchhoff's Loop Rule?

  Identify circuit elements
• Kirchhoff's Loop Rule and Junction Rule are complementary rules.


  True