Circuits & Magnetism Unit Review

What is the unit for potential difference?

• Ohm

• Volt

• Watt

• Ampere

What is the unit for current?

• Ampere

• Watt

• Volt

• Ohm

What is the unit for resistance?

• Watt

• Joule

• Ohm

• Volt

If the potential difference is 12 volts and the resistance is 5 ohms, what is the current?

• 2.4 A

• 60 A

• 0.417 A

• 17 A

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.
• The same current flows through all three light bulbs.
• It uses a single battery.
• The electrical current is divided between the three light bulbs.

The mathematical relationship among Voltage, Current, and Resistance

• Faraday's Law
• Tesla's Law
• Edison's Law
• Ohm's Law

If the Voltage is increased and the resistance stays the same, Current will

• Increase
• Decrease
• Stay the same
• X

This is an example of a ______ circuit

• Series

• Parallel

• Open

• Dihexihedral

What size resistor would produce a current flow of 5 Amps with a battery voltage of 12.6 volts

• 60 Ohms
• 2.52 Ohms
• 1.71 ohms
• 5.04 Ohms

What is the current in a 10V circuit if the resistance is 2Ω?

• 20 amps
• 8 amps
• 5 amps