Electrical and Circuit Fundamentals Quiz

What does Ohm’s Law state?

• Current = Resistance ÷ Voltage

• Voltage = Current × Resistance

• Resistance = Current × Voltage

• Power = Current × Voltage

What is the unit of electrical resistance?

• Volt

• Ampere

• Ohm

• Watt

A circuit has 12 volts and 3 ohms of resistance. How much current flows?

• 2 A

• 3 A

• 4 A

• 6 A

Which tool is best for measuring current flow in a circuit without breaking it open?

• Voltmeter

• Clamp-on Ammeter

• Test Light

• Ohmmeter

What type of circuit has only one path for current to flow?

• Parallel

• Series

• Combination

• Open

What will happen in a series circuit if one component opens?

• Current bypasses the open component

• Circuit continues to operate normally

• Entire circuit stops operating

• Current increases

Which fuse type can reset itself after cooling down?

• Cartridge fuse

• Maxi fuse

• Circuit breaker

• Fusible link

A fusible link is designed to protect:

• Only sensors

• High-current circuits

• Low-current circuits

• The ignition coil

A dim headlight on one side but normal on the other usually indicates:

• Blown fuse

• High resistance in the ground circuit

• Faulty alternator

• Weak battery

What is the main purpose of a relay in an electrical circuit?

• Reduce current flow

• Control high current with a low current signal

• Convert AC to DC

• Increase voltage output