Electrical Wiring Extension

What is the unit of electric current?

• Volt

• Watt

• Ampere

• Ohm

Which device is used to interrupt the current in a circuit when there is an overload?

• Fuse

• Circuit breaker

• Multimeter

• GFCI

What is the primary function of a photovoltaic cell?

• To store energy

• To convert solar energy into electricity

• To measure voltage

• To provide insulation

What type of current flows in one direction only?

• Alternating Current (AC)

• Direct Current (DC)

• Both AC and DC

• Electric Current

A homeowner notices that the lights in their house flicker when the refrigerator starts. After checking, they find the circuit breaker trips frequently. What might be causing the flickering lights and circuit breaker trips? Discuss the role of load and circuit breakers in this scenario.

During a science experiment, students use a multimeter to measure the voltage across a battery and find it to be significantly lower than expected. What could be the possible reasons for the low voltage reading, and how does this relate to the concepts of direct current and battery operation?

An engineer is tasked with designing a new electrical system for a building that will utilize both single-phase and three-phase power. What considerations should the engineer take into account regarding the differences between single-phase and three-phase power in terms of efficiency and application?

Given the importance of insulators in electrical systems, what materials would you choose for insulating high-voltage wires, and why?

In a solar power system, how would you explain the role of a step-up transformer to someone unfamiliar with electrical engineering?

If a technician finds a voltage drop across a length of wire, what might they need to consider regarding wire gauge and distance for future installations?