MCA Second Engineer Marine Electro-Technology Practice Questions - MCA Second Engineer - Marine Electro-Technology (SQA Written Examination) Exam

According to electron theory, which statement best distinguishes conductors, semiconductors and insulators?

Conductors have many free electrons, semiconductors have a moderate number, insulators have almost none free to move Conductors have no free electrons while insulators have many free electrons Semiconductors always have more free electrons than metals Insulators conduct only when reverse-biased like a diode

Correct Answer:

Conductors have many free electrons, semiconductors have a moderate number, insulators have almost none free to move

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