Electronic Devices Circuits Diode Capacitances Online Exam Quiz
Electronic Devices Circuits Diode Capacitances GK Quiz. Question and Answers related to Electronic Devices Circuits Diode Capacitances. MCQ (Multiple Choice Questions with answers about Electronic Devices Circuits Diode Capacitances
The transition capacitance, CT of a PN junction having uniform doping in both sides, varies with junction voltage as ________
Options
A : (VB )1/2
B : (VB )-1/2
C : (VB )1/4
D : (VB )-1/4
A silicon PN junction diode under revers bias has depletion width of 10µm, relative permittivity is 11.7 and permittivity, ?0 =8.85×10-12F/m. Then depletion capacitance /m2 =?
Options
A : 0.1µF/m2
B : 1.7µF/m2
C : 10µF/m2
D : 0.5µF/m2
For an abrupt PN junction diode, small signal capacitance is 1nF/cm2 at zero bias condition.If the built in voltage, Vbi is 1V, the capacitance at reverse bias of 99V is?
Options
A : 0.1nF/cm2
B : 1nF/cm2
C : 1.5nF/cm2
D : 2nF/cm2
Consider an abrupt PN junction. Let V0 be the built in potential of this junction and VR be the reverse bias voltage applied. If the junction capacitance Cj is 1pF for V0+VR =1V, then for V0+VR =4V what will be the value of Cj?
Options
A : 0.1pF
B : 1.7pF
C : 1pF
D : 0.5Pf
The built in capacitance V0 for a step graded PN junction is 0.75V. Junction capacitance Cj at reverse bias when VR=1.25V is 5pF. The value of Cj when VR=7.25V is?
Options
A : 0.1pF
B : 1.7pF
C : 1pF
D : 2.5Pf
The CT for an abrupt PN junction diode is ________
Options
A : CT = K/(V0+VB)1/2
B : CT = K/(V0+VB)-1/2
C : CT = K/(V0+VB)1/3
D : CT = K/(V0+VB)-1/3
The diffusion capacitance of a PN junction _______
Options
A : decreases with increasing current and increasing temperature
B : decreases with decreasing current and increasing temperature
C : increasing with increasing current and increasing temperature
D : doesnot depend on current and temperature
Compared to a PN junction with NA=1014/CM3, which one of the following is true for NA=ND= 1020/CM3?
Options
A : depletion capacitance decreases
B : depletion capacitance increases
C : depletion capacitance remains same
D : depletion capacitance can’t be predicted
Transition capacitance is also called as _______
Options
A : diffusion capacitance
B : depletion capacitance
C : conductance capacitance
D : resistive capacitance
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