Ohm's Law Quiz

What is Ohm's Law?

• Voltage = Current × Resistance

• Voltage = Current + Resistance

• Voltage = Current - Resistance

• Voltage = Current ÷ Resistance

What unit is used to measure resistance?

• Volts

• Amperes

• Ohms

• Watts

If a circuit has a voltage of 12 volts and a resistance of 4 ohms, what is the current flowing through the circuit?

• 3 Amperes

• 4 Amperes

• 12 Amperes

• 48 Amperes

Which of the following is the correct formula to calculate power in an electrical circuit?

• Power = Voltage × Current

• Power = Voltage ÷ Current

• Power = Current × Resistance

• Power = Resistance × Voltage

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

• It remains the same

• It doubles

• It halves

• It quadruples

A circuit has a current of 2 Amperes and a resistance of 5 Ohms. What is the voltage across the circuit?

• 10 Volts

• 7 Volts

• 5 Volts

• 2 Volts

In a series circuit, if one resistor is removed, what happens to the total resistance?

• It decreases

• It increases

• It remains the same

• It becomes zero

If a circuit has a voltage of 24 volts and a current of 6 amperes, what is the resistance?

• 4 Ohms

• 6 Ohms

• 12 Ohms

• 18 Ohms

Explain how Ohm's Law can be applied to determine the necessary resistance in a circuit to achieve a desired current when a specific voltage is applied.

• By using the formula $R = \frac{V}{I}$

• By using the formula $R = V + I$

• By using the formula $R = V - I$

• By using the formula $R = V \times I$

Design an experiment to test the relationship between voltage, current, and resistance in a circuit. What variables will you control, and what will you measure?

• Control voltage, measure current

• Control current, measure resistance

• Control resistance, measure voltage

• Control all variables, measure none