# The D.C load line and – Q – point of the transistor circuit shown below. If the current gain hFE of a transistor is 120 then the value of R1&R2 when the transistor is biased – stable

1.  40.1 kΩ

2.   32.3 kΩ, 7.37 kΩ

3.  25 kΩ, 8 kΩ

4.  None

4

32.3 kΩ, 7.37 kΩ

Explanation :
No Explanation available for this question

# For following circuit. R1 = 1.01 KΩ. R2 = 99.7 KΩ, R3 = 0.995 KΩ & R4 = 102 kΩ the value of CMMRdB is

1.  .86.7 dB

2.  78.6 dB

3.  68.7 dB

4.  87.7 dB

4

68.7 dB

Explanation :
No Explanation available for this question

# For the circuit shown below, if the current gain of the transistor is 100 and RE = 3 kΩ then value of R1&R2 such that the transistor is bias stable and VE = 0

1.   190.5 kΩ, 36.6 kΩ

2.  198.3 kΩ,38.6 kΩ

3.   151.5 kΩ, 37.8 kΩ

4.  None

4

151.5 kΩ, 37.8 kΩ

Explanation :
No Explanation available for this question

# For the half rectifier circuit shown below, if the diode is considered to be piecewise linear model having zero forward resistance, then which one of the following represents the voltage across the diode

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# For the emitter follower amplifier circuit shown below if VBE(on) = 0.7V, β = 100, Cc = 1μ, then 3dB frequency of this amplifier at 300K is (consider ideal voltage source vi)

1.  8 Hz

2.  16 Hz

3.  20 Hz

4.  16 kHz

4

16 Hz

Explanation :
No Explanation available for this question

# For the circuit shown below, if RC = 2.2 kΩ. RE = 2 kΩ, R1 = 10 kΩ, R2 = 20 kΩ, & β = 60. Then which one of the following represents ICQ, VEQ,VCQ respectively

1.   3.56mA, -2.76V, 2.16V

2.  3.56mA, 2.76V, -2.16V

3.  3.56mA, 2.76V, 2.16V

4.  None

4

3.56mA, 2.76V, -2.16V

Explanation :
No Explanation available for this question

# In a common-emitter amplifier with non-zero source and load resistances, the input time constant is usually much larger than the output time constant because

1.  The input loop resistance is very high

2.  The collector capacitance (Cc) is much larger than the emitter capacitance Cc)

3.  The base collector resistance is very high

4.  The Cc is much larger than Cc and Ce appear in the input loop multiplied by the voltage gain, due to the Miller effect

4

The Cc is much larger than Cc and Ce appear in the input loop multiplied by the voltage gain, due to the Miller effect

Explanation :
No Explanation available for this question

# In Hartley oscillator with inverting op-Amp shown below, the condition for stable oscillation is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The high frequency hybrid π model of a bipolar transistor has………..capacitance

1.  2

2.  3

3.  1

4.  Zero

4

2

Explanation :
No Explanation available for this question

# For a 555 timer IC shown below match the pin number corresponding to their function. Pin No. Function 1. 2 A. Discharge 2. 3 B. Output 3. 6 C. Trigger 4. 7 D. Threshold

1.   1 2 3 4 C B D A

2.   1 2 3 4 A B C D

3.   1 2 3 4 D C B A

4.   1 2 3 4 B C D A

4