Understanding Ohm's Law Quiz

What does Ohm's Law describe in an electrical circuit?

• The relationship between current, voltage, and resistance

• The conservation of energy

• The direction of magnetic fields

• The speed of light in a vacuum

Which of the following is the correct formula for Ohm's Law?

What is the SI unit of resistance?

• Ampere

• Volt

• Ohm

• Watt

Which symbol is commonly used to represent resistance in circuit diagrams?

Which of the following is a practical application of Ohm's Law?

• Calculating the required resistance to limit current in an LED circuit

• Determining the gravitational force between two objects

• Measuring the speed of sound in air

• Calculating the frequency of a wave

If the resistance in a circuit is doubled while the voltage remains constant, what happens to the current according to Ohm's Law?

• It doubles

• It is halved

• It remains the same

• It becomes zero

You have a circuit with a fixed voltage source. If you want to increase the current flowing through the circuit, what should you do to the resistance, and why? Use Ohm's Law to justify your answer.

• Increase the resistance, because current is directly proportional to resistance

• Decrease the resistance, because current is inversely proportional to resistance

• Keep the resistance the same, because current does not depend on resistance

• Increase the resistance, because current is inversely proportional to resistance