SEMICONDUCTOR

• A

• B

• C

• D

A LED emits visible white light when its

• junction is reversed biased

• depletion layer widens

• holes and electrons recombine

• junction becomes hot

Solar cell operates on a principle of

•  diffusion

• recombination

• photovoltaic action

• carrier flow

In a common base configuration, the transistor has emitter current of 10 mA and collector current of 9.8 mA. The value of base current is….

•   0.1 mA

   

• 0.2 mA

• 0.3 mA

•   0.4 mA

•  0.1

• 0.66

• 0.75

• 0.98

• 45

• 50

• 55

• 60

For which logic gate the following statement is true

The output is low, if and only if all inputs are low

• AND

• OR

• NOR

• NAND