# For the amplifier circuit shown below, the type of amplifier and the feedback factor(β) is

1.

2.

3.

4.  None of these

4 Explanation :
No Explanation available for this question

# The function of the diode D in the circuit in the timer circuit as shown below is to

1.  To increase the charging time of C

2.  To decrease the charging time of C

3.  To increase the discharging time of C

4.  To decrease the discharging time of C

4

Explanation :
No Explanation available for this question

# For proper bias stability bias stability, the stability factor is

1.  ≤ 1

2.  > 1

3.   >> 1

4.  None

4

≤ 1

Explanation :
No Explanation available for this question

# The circuit shown represents

1.  An astable multivibrator

2.  A monostable multivibrator

3.  A voltage control oscillator

4.  Ramp generator

4

An astable multivibrator

Explanation :
No Explanation available for this question

# The PIV and peak current through the diode are represent rely

1.  40V,40mA

2.  40V,160mA

3.  640V,640mA

4.  64V,64mA

4

40V,40mA

Explanation :
No Explanation available for this question

# Consider a two port network, the dimensions of the hybrids parameter h11, h12 h21 & h22 for this two port network are

1.  Ohm, no dimension, no dimension, mho

2.  Mho, ohm, no dimension, no dimension

3.  No dimension, no dimension, ohm, mho

4.  None of these

4

Ohm, no dimension, no dimension, mho

Explanation :
No Explanation available for this question

# The condition for stable oscillations for a Wein bridge oscillator circuit shown below is

1.

2.

3.

4.

4 Explanation :
No Explanation available for this question

# For the emitter follower circuit shown below, V+ = 5V,5V- = -5V, RS = 0.1 kΩ, R1 = 40 kΩ,R2 = 5.72 kΩ,RE = 0.5 kΩ,RL = 10 kΩ the transistor parameter at 300K are β= 150, VBE(on) = 0.7V, VA= ∞, Cπ = 35 PF and Cμ = 4PF. Neglect the effect of load capacitor CL The frequency due to zero ( f0 ) of the emitter follower is

1.  f0 = 1.56 GHz

2.   f0 = 180 MHz

3.  f0 = 1.56 MHz

4.  f0 = 180 KHz

4

f0 = 180 MHz

Explanation :
No Explanation available for this question

# What be the current gain (hfe) of a common emitter amplifier. When the load resistance is increased

1.   Increases

2.  Decreases

3.  Decreases and then increases

4.  Increases and then decreases

4

Decreases

Explanation :
No Explanation available for this question

# The frequency due to zero ( f0 ) of the emitter follower is

1.  f0 = 1.56 GHz

2.  f0 = 180 MHz

3.   f0 = 1.56 MHz

4.  f0 = 180 KHz

4