2.1.4 Ohm's Law

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

  Voltage is proportional to current
• The formula for Ohm's Law is V = IR
• What condition must be met for Ohm's Law to hold true?

  Constant temperature
• In Ohm's Law, the variable V represents voltage
• What unit is used to measure current in Ohm's Law?

  Amperes
• What is the voltage across a circuit with a resistance of 10 ohms and a current of 2 amperes?

  20 volts
• Ohm's Law states that the voltage across a conductor is inversely proportional to the current.

  False
• In Ohm's Law, the variable $R$ represents resistance
• How does voltage relate to current in a circuit according to Ohm's Law?

  Directly proportional
• In Ohm's Law, voltage is the electrical potential difference that drives current
• What is the voltage across a circuit with a resistance of 5 ohms and a current of 2 amperes?

  10 volts
• Ohm's Law is valid regardless of temperature changes.

  False
• Ohm's Law is expressed as V = IR
• What is the unit for voltage in Ohm's Law?

  Volts
• What does Ohm's Law describe the relationship between?

  Voltage, current, and resistance
• Ohm's Law states that $V =$$IR$, where $V$ is the voltage, $I$ is the current, and $R$ is the resistance
• Voltage is measured in volts.
• Current is measured in amperes
• Resistance is measured in ohms.
• What is the unit for voltage in Ohm's Law?

  Volts
• In Ohm's Law, the unit for current is amperes
• What formula is used to calculate voltage in Ohm's Law?

  $V =$$IR$
• The formula to calculate current in Ohm's Law is $I =$$\frac{V}{R}$
• What condition must remain constant for Ohm's Law to apply?

  Temperature
• Ohm's Law states that voltage is directly proportional to current when resistance is constant
• What is the unit of resistance?

  Ohms
• If a circuit has a resistance of 10 ohms and a current of 2 amperes, the voltage is 20
• Ohm's Law states that voltage is directly proportional to current when resistance is constant
• What is the formula for Ohm's Law?

  $V =$$IR$
• Match the variable with its description and unit:

  Voltage ↔️ Electrical potential difference in volts

  Current ↔️ Flow of electrons in amperes

  Resistance ↔️ Opposition to electron flow in ohms
• If a circuit has a voltage of 12V and a resistance of3Ω, the current is 4
• What does the variable $V$ represent in Ohm's Law?


  Voltage
• What is the unit of current?

  Amperes
• Calculate the voltage in a circuit with a current of 2 amperes and a resistance of 10 ohms.

  20 volts
• The formula for calculating voltage using Ohm's Law is $V =$$IR$
• To calculate voltage using Ohm's Law, you multiply current by resistance
• What is the voltage if the current is 3 amperes and the resistance is 12 ohms?

  36 volts
• What is the formula for calculating current using Ohm's Law?

  $I =$$\frac{V}{R}$
• What is the current if the voltage is 24 volts and the resistance is 6 ohms?

  4 amperes
• To calculate resistance using Ohm's Law, you use the formulaR = \frac{V}{I}</latex>