21) When a positive d.c voltage is applied to then-side relative to p-side, a diode is said to be given a
a) forward bias
b) reverse bias
c) zero bias
d) neutral bias
22) Which one of the following causes phase shift through an op-amp ?
a) internal RC circuits
b) External RC circuits
c) Gain roll off the internal transistor
d) Negative feedback
23) Which one of the following devices can be turned ‘ON’ or ‘OFF’ by applying gate signal ?
a) SCR
b) SCS
c) Triac
d) UJT
24) Which one of the following is not LED material ?
a) GaAs
b) GaP
c) SiC
d) SiO2
25) Atomic number of silicon is
a) 12
b) 13
c) 14
d) 15
26) LED is a
a) p-n diode
b) Thermistor
c) Gate
d) Transistor
All The Best!!