What crucial component of the electric system did Michael Faraday invent?

Michael Faraday is renowned for his invention of the electric dynamo, which played a pivotal role in the development of electric power generation. The electric dynamo converts mechanical energy into electrical energy through electromagnetic induction, a principle that Faraday discovered. This technology laid the groundwork for modern electrical generators and is essential for producing electricity on a large scale.

The other options are related to electrical technology but do not directly connect to Faraday's contributions. The light bulb, for example, was significantly developed by Thomas Edison, while the electric chair and record player are inventions that arose later and did not directly involve Faraday's work in electromagnetism. Faraday's foundational discoveries in electromagnetism significantly influenced the design of various electrical devices, highlighting the significance of his invention.