What is Ohm’s Law used to determine in electrical circuits?
Ohm’s Law is a basic principle in electrical theory that relates voltage, current, and resistance in a circuit.
Which unit is used to measure electrical resistance?
Resistance is measured in ohms, which is represented by the Greek letter omega (Ω).
What safety gear is essential when working with live electrical circuits?
Personal protective equipment (PPE) such as insulated gloves, eye protection, and flame-resistant clothing is critical for electrical safety.
Which device automatically interrupts power in case of a fault?
A circuit breaker is designed to interrupt the flow of electricity in case of a short circuit or overload.
Which of the following is a common cause of electrical fires?
Overloaded circuits and faulty wiring are frequent sources of electrical fires.
What does GFCI stand for?
GFCI stands for Ground Fault Circuit Interrupter, which protects against electrical shock.
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Which of the following is a conductor of electricity?
Materials like copper and aluminum are conductors, allowing the flow of electric current.
Why is grounding important in electrical systems?
Grounding prevents electrical shock by providing a path for excess current to safely dissipate.
Which code governs electrical installations in the U.S.?
The National Electrical Code (NEC) sets standards for safe electrical design, installation, and inspection.