Electronic Devices and Circuits
Silicon is not suitable for fabrication of light emitting diodes because it is

An indirect band gap semiconductor
Wideband gap semiconductor
Narrowband gap semiconductor
Direct band gap semiconductor

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Electronic Devices and Circuits
Assertion (A): In p-n-p transistor collector current is termed negative.Reason (R): In p-n-p transistor holes are majority carriers.

Both A and R are true but R is not a correct explanation of A
Both A and R are true and R is correct explanation of A
A is false but R is true
A is true but R is false

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