Electrical Multiple Choice Questions & Answers

What is the unit of electrical resistance?

• Ohm

• Volt

• Ampere

• Watt

What is the function of a fuse in an electrical circuit?

• To regulate voltage

• To provide insulation

• To protect against overcurrent

• To increase resistance

Which material is commonly used as a conductor in electrical wiring?

• Copper

• Wood

• Rubber

• Plastic

What does AC stand for in electricity?

• Alternating Current

• Active Current

• Amplified Charge

• Applied Conduction

Which law states that voltage is equal to current multiplied by resistance?

• Ohm's Law

• Kirchhoff's Law

• Faraday's Law

• Coulomb's Law

What is the main purpose of a transformer?

• To store electrical energy

• To convert DC to AC

• To step up or step down voltage

• To measure current

Which type of circuit has components arranged in a single path?

• Parallel Circuit

• Series Circuit

• Open Circuit

• Short Circuit

What is the standard frequency of AC supply in most countries?

• 50 Hz

• 60 Hz

• 100 Hz

• 120 Hz

Which device is used to measure electric current?

• Voltmeter

• Ammeter

• Ohmmeter

• Wattmeter

What is the primary function of a diode?

• To store energy

• To amplify signals

• To allow current in one direction

• To convert AC to DC