11.2 Ohm's Law and Resistance

• What does Ohm's Law state regarding the relationship between voltage, current, and resistance?

  V = IR
• What are the units of measurement for voltage, current, and resistance respectively?

  Volts, Amperes, Ohms
• What is the mathematical expression of Ohm's Law?

  V = IR
• In Ohm's Law, what is the relationship between voltage, current, and resistance?

  V = IR
• What electrical variables are described in Ohm's Law?

  Voltage, Current, Resistance
• What is the mathematical expression of Ohm's Law?

  V = IR
• What is the relationship between voltage, current, and resistance described in Ohm's Law?

  V = IR
• What unit is used to measure the potential difference across a conductor?

  Volts (V)
• The variables in Ohm's Law are voltage, current, and resistance
• Ohm's Law implies that current is inversely proportional to resistance
• Match the electrical variable with its symbol, units, and relationship in Ohm's Law:

  Voltage ↔️ V, volts, direct proportion to current

  Current ↔️ I, amperes, inverse proportion to resistance

  Resistance ↔️ R, ohms, inverse proportion to current
• The unit for voltage is volts.


  True
• The unit for current is amperes.


  True
• The unit for resistance is ohms.


  True
• Resistance is measured in ohms.


  True
• Current is the flow of electric charge
• The mathematical expression of Ohm's Law is V = IR
• Voltage is directly proportional to current and resistance
• Ohm's Law describes the relationship between voltage, current, and resistance.

  True
• Voltage is directly proportional to current in Ohm's Law.

  True
• If a 12V battery is connected to a 4Ω resistor, the current flowing through the resistor is 3A.


  True
• Voltage is the potential difference across a conductor
• The mathematical expression of Ohm's Law is V=IR
• Resistance is the opposition to the flow of current in a conductor.


  True
• Ohm's Law holds true for all materials under all conditions.

  False
• If a 12V battery is connected to a 4Ω resistor, the current flowing through the resistor is 3A
• A 5Ω resistor with a current of 2A has a voltage drop of 10V
• If a 12V battery is connected to a 4Ω resistor, the current flowing through the resistor is 3A
• A 5Ω resistor with a current of 2A has a voltage drop of 10V
• The mathematical expression of Ohm's Law is V = IR
• What does resistance oppose in a conductor?

  The flow of current
• Which variable in Ohm's Law is measured in ohms?

  Resistance
• What does Ohm's Law state about the relationship between voltage, current, and resistance?

  Voltage is directly proportional to current and resistance
• Match the variable in Ohm's Law with its unit:

  Voltage ↔️ Volts (V)

  Current ↔️ Amperes (A)

  Resistance ↔️ Ohms (Ω)
• Resistance is the opposition to the flow of current in a conductor.


  True
• Voltage is directly proportional to both current and resistance
• What represents the potential difference between two points in an electric circuit?

  Voltage
• The symbol for voltage is V
• The unit of voltage is volts
• Ohm's Law states that voltage is equal to the product of current and resistance