Understanding OHM's Law Quiz

What is the definition of Ohm's Law?

• The current through a conductor between two points is directly proportional to the voltage across the two points.

• The resistance of a conductor is inversely proportional to its length.

• The power dissipated in a conductor is proportional to the square of the current.

• The voltage across a conductor is inversely proportional to the current through it.

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

If the voltage across a resistor is 12V and the current through it is 3A, what is the resistance?

• 2 ohms

• 4 ohms

• 6 ohms

• 8 ohms

Which of the following is an application of Ohm's Law?

• Calculating the power consumption of an electrical device.

• Determining the resistance of a resistor in a circuit.

• Measuring the capacitance of a capacitor.

• Finding the inductance of an inductor.

If the resistance in a circuit is doubled while keeping the voltage constant, what happens to the current?

• It doubles.

• It halves.

• It remains the same.

• It quadruples.

What is the unit of resistance?

• Volt

• Ampere

• Ohm

• Watt

In a series circuit with a total resistance of 10 ohms and a voltage supply of 20V, what is the current flowing through the circuit?

• 1A

• 2A

• 4A

• 5A

Which of the following statements is true about the relationship between voltage and current in Ohm's Law?

• Voltage is inversely proportional to current.

• Voltage is directly proportional to current.

• Voltage is independent of current.

• Voltage is equal to the square of the current.

If a resistor has a resistance of 5 ohms and the current through it is 2A, what is the voltage across the resistor?

• 5V

• 7V

• 10V

• 15V

Which of the following is NOT an application of Ohm's Law?

• Designing electrical circuits.

• Calculating the resistance needed for a specific current.

• Measuring the frequency of an AC signal.

• Troubleshooting electrical problems.