Ohm's Law Quiz

What is the formula for Ohm's Law?

If a circuit has a current of 2 Amperes and a resistance of 5 Ohms, what is the voltage across the circuit?

• 2.5 Volts

• 7 Volts

• 10 Volts

• 0.4 Volts

A light bulb has a resistance of 240 Ohms and is connected to a 120 Volt power supply. What is the current flowing through the bulb?

• 0.5 Amperes

• 2 Amperes

• 360 Amperes

• 0.2 Amperes

What happens to the current if the voltage is doubled while the resistance remains constant?

• It is halved

• It remains the same

• It is doubled

• It is quadrupled

If a resistor with a resistance of 10 Ohms is connected across a voltage source of 5 Volts, what is the current through the resistor?

• 0.5 Amperes

• 2 Amperes

• 1.5 Amperes

• 0.2 Amperes

Using Ohm's Law, calculate the resistance if a device draws 4 Amperes of current when connected to a 20 Volt source.

• 5 Ohms

• 80 Ohms

• 16 Ohms

• 24 Ohms

What unit is used to measure resistance?

• Volt

• Ampere

• Ohm

• Watt

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

• It increases

• It decreases

• It remains unchanged

• It becomes zero

A circuit has a voltage of 9 Volts and a current of 3 Amperes. What is the resistance of the circuit?

• 3 Ohms

• 6 Ohms

• 12 Ohms

• 27 Ohms