Ohm's Law Quiz

What is the mathematical formula for Ohm's law?

• V = I * R

• V = R / I

• V = I + R

• V = I / R

If the voltage is 12 volts and the current is 3 amps, what is the resistance?

• 2 ohms

• 6 ohms

• 4 ohms

• 10 ohms

How do you calculate resistance in a circuit?

• R = V/I

• R = V - I

• R = V + I

• R = V x I

What is the relationship between voltage and current in Ohm's law?

• The relationship between voltage and current in Ohm's law is that they are inversely proportional to each other.

• The relationship between voltage and current in Ohm's law is that they are directly proportional to each other.

• The relationship between voltage and current in Ohm's law is that they are only related in alternating current circuits.

• The relationship between voltage and current in Ohm's law is that they are not related to each other.

If the resistance in a circuit is 5 ohms and the current is 2 amps, what is the voltage?

• 7 volts

• 3 volts

• 15 volts

• 10 volts

Explain how Ohm's law is used in designing electrical circuits.

• By using the formula V = I / R to determine the voltage, current, or resistance needed for a specific circuit design.

• By using the formula V = I * R to determine the voltage, current, or resistance needed for a specific circuit design.

• Ohm's law is not used in designing electrical circuits.

• By using the formula V = I + R to determine the voltage, current, or resistance needed for a specific circuit design.

If the voltage in a circuit is doubled, what happens to the current if the resistance remains the same?

• The current will double

• The current will be halved

• The current will remain the same

• The current will decrease by 25%

What happens to the current in a circuit if the resistance is increased?

• Fluctuates

• Decreases

• Increases

• Remains the same

How does Ohm's law apply to the use of resistors in electronic devices?

• Ohm's law cannot be used to calculate the current flowing through the resistor

• Ohm's law can be used to calculate the resistance of the resistor when the voltage across it is unknown

• Ohm's law only applies to capacitors in electronic devices

• Ohm's law can be used to calculate the current flowing through the resistor when the voltage across it is known, or to calculate the resistance of the resistor when the current flowing through it and the voltage across it are known.

What is the unit of measurement for electrical resistance?

• Ohm

• Ampere

• Volt

• Watt