Basic electrical circuits require key elements to function properly. What are they?

• A. Battery, switch, resistor
• B. Source, wire, device
• C. Voltage source, conductor, load
• D. Generator, capacitor, load

Answer: (C)

Basic electrical circuits need three things: a source of electrical energy, a conducting path, and a load that uses that energy. The voltage source provides the potential difference that drives current through the circuit. The conductor, typically wires, gives the path for that current to flow. The load is the element that consumes the energy and converts it into useful form (light, heat, motion, etc.).

This trio is universal: without a source there’s no push of charges, without a complete path the current can’t flow, and without a load there’s no place for the energy to do work. The described combination—voltage source, conductor, and load—captures this fundamental setup. Other options introduce elements like switches or capacitors that aren’t required for all circuits, or use vague terms like device instead of load, which don’t specify the essential roles as clearly.