Main advantage of photovoltaic cells?

• A. Few or no moving parts; suitable for small-scale use.
• B. They require extensive maintenance due to moving parts.
• C. They generate heat rather than electricity.
• D. They convert sunlight directly into electricity.

Answer: (D)

Photovoltaic cells work by converting sunlight directly into electricity through the photovoltaic effect. This direct conversion means you get electrical power from light without burning fuel, producing emissions-free energy and enabling easy, scalable deployment—from rooftop panels to large solar farms. While having few moving parts helps keep maintenance low, the main advantage is the ability to generate electricity directly from sunlight. The other statements aren’t correct because PV cells don’t rely on moving parts that require extensive maintenance, and they aren’t primarily designed to generate heat.