Electronics

A. antimony
B. phosphorus
C. aluminium
D. arsenic

A. minority carriers
B. majority carriers
C. holes
D. electron

A. 105 ohm metre
B. 106 ohm metre
C. 107 ohm metre
D. 108 ohm metre

A. Conduction band
B. Fermi band
C. Valence band
D. Forbidden band

A. during the manufacturing process
B. under forward bias
C. under reverse bias
D. when temperature varies

A. using a transistor
B. suppressing the harmonics in A.C voltage
C. suppressing half wave of A.C supply by using diode
D. using a Coolidge tube

A. equal to emitter current
B. slightly less than emitter current
C. greater than emitter current
D. any of above

A. n
B. p
C. mix
D. any of above

A. The switch
B. The light emitting diode
C. The photo diodes
D. Solar cells.

A. An amplifier.
B. A rectifier
C. Filtering circuit
D. Converter.