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Voltage and Current - Technical MCQs

Q1:

Which electronics material opposes the movement of free electrons?

A Conductor

B Insulator

C Semiconductor

D Element

ANS:C - Semiconductor

In insulators there is a large forbidden gap in between conduction band n vacancy band. So practically it s impossible for electron to jump from valence band to conduction band. So such materials cannot conduct so these are called insulators e.x diamond, glass wood.