# ac small-signal midband voltage gain(V0/Vs) will be

1.  -15

2.  -20

3.  -25

4.   -30

4

-25

Explanation :
No Explanation available for this question

# Upper 3 dB frequency of the circuit will be

1.  12.9 MHz

2.  13.9 MHz

3.  14.9 MHz

4.   15.9MHz

4

15.9MHz

Explanation :
No Explanation available for this question

# A diode has reverse saturation current Ia=10-18A and non ideality factor η=1.05.If diode has current of 70μA,then diode voltage is

1.  0.63V

2.  0.87V

3.  0.54V

4.  0.93V

4

0.87V

Explanation :
No Explanation available for this question

# Consider the above circuit, for Vi=Vm sinωt, the output voltage V0 for RL-> will beConsider the above circuit, for Vi=Vm sinωt, the output voltage V0 for RL-> will be

1.  Zero

2.  Vm

3.  2Vm

4.   -Vm

4

2Vm

Explanation :
No Explanation available for this question

# The excess hole concentration is

1.  6.8*1012e-246xcm-3,x≥0

2.  6.8*1012e+246xcm-3,x≥0

3.  3.8*1014e-3534xcm-3,x≥0

4.  3.8*1014e+3534xcm-3,x≥0

4

3.8*1014e-3534xcm-3,x≥0

Explanation :
No Explanation available for this question

# Hole diffusion current density at x=3μm is

1.  0.6A/cm2

2.  0.6*10-3A/cm2

3.  0.4A/cm2

4.  0.4*10-3A/cm2

4

0.6A/cm2

Explanation :
No Explanation available for this question

# The doping concentration of a silicon pn junction are N4=1016cm-3 and Na=8*1015cm-3 Cross sectional area is 10-3 cm2.The minority carrier life time are Τno=1μs and τpo=0.1μs. The minority carrier diffusion coefficients are Dn=35cm2/sec and Dp=10cm2/s Total number of excess electron in the pregion ,if applied forward bias is Va=0.5Va is

1.  4*107cm-3

2.  6*1010 cm-3

3.  4*1010 cm-3

4.  6*107 cm-3

4

4*107cm-3

Explanation :
No Explanation available for this question

# A pn junction biased at Va=0.72V has DC bias current Ipq=2mA. The minority carrier life time is 1μs in both the n and p regions. The diffusion capacitance is

1.  4.9*10-8F

2.  3.86*10-8F

3.  7.74*10-8F

4.  9.86*10-3F

4

3.86*10-8F

Explanation :
No Explanation available for this question

# The output Vdc from the above circuit is

1.  12

2.  12/π

3.  24/π

4.   12/

4

12/π

Explanation :
No Explanation available for this question

1.  38.7+j12.1Ω

2.  23.5+j7.5Ω

3.  38.7-j12.1Ω

4.  23.5-j7.5Ω

4