Ohm's Law

How much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 3 ohms?

• 1 ampere

• 2 amperes

• 3 amperes

• 4 amperes

How much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 12 ohms?

• 0.75 A

• 1.5 A

• 0.5 A

• 1 A

A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. What is the current?

• 0.5 A

• 1 A

• 1.5 A

• 2 A

A circuit contains two 1.5 volt batteries and a bulb with a resistance of 3 ohms. Calculate the current.

• 1 ampere

• 0.5 ampere

• 2 amperes

• 1.5 amperes

What is the voltage of a circuit with 15 amps of current and toaster with 8 ohms of resistance?

• 120 volts

• 100 volts

• 150 volts

• 200 volts

A light bulb has a resistance of 4 ohms and a current of 2 A. What is the voltage across the bulb?

• 8 volts

• 6 volts

• 10 volts

• 12 volts

How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance?

• 50 volts

• 10 volts

• 100 volts

• 5 volts

How many ohms of resistance must be present in a circuit that has 120 volts and a current of 10 amps?

• 12 ohms

• 10 ohms

• 15 ohms

• 8 ohms

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

• 240 ohms

• 120 ohms

• 60 ohms

• 480 ohms

A portable CD player uses two 1.5 V batteries. If the current in the CD player is 2 A, what is its resistance?

• 1.5 ohms

• 2 ohms

• 3 ohms

• 4 ohms