# For ideal OP-AMP, find V0 when Vi=(1-e-αt)u(t) where α=1/(RACA) and capacitor to be unchanged at input application

1.   (RA/RB) u(t)

2.  (-RA/RB) u(t) (1-e-αt)

3.  (RB/RA) u(t)

4.  -(RB/RA) u(t)

4

-(RB/RA) u(t)

Explanation :
No Explanation available for this question

# For ideal OP-AMP,V0 when Vi=(1-e-αt)u(t) where α=1/(RACA) and capacitor to be unchanged at input application.What will be the output if input voltage is (1-e-αt) u(t)

1.   Same

2.  Different

3.  Same if capacitor is charged at input application

4.  none of these

4

Different

Explanation :
No Explanation available for this question

# The single pole low pass filter has a loss of 3 dB at corner frequency. By adding a second pole, the system becomes second order. If we desire that the loss should be still less, the slope of role off must be made steeper and this is done by adding a second pole.

1.  Whole statement is true

2.  There are major mistakes in statement

3.  Can’t be said actually

4.  System lacks only some information to guarantee its correctness

4

Whole statement is true

Explanation :
No Explanation available for this question

# What will be the gain for the circuit shown above considering it as ideal op amp

1.  25

2.  24

3.  -24

4.  None of these

4

-24

Explanation :
No Explanation available for this question

# Find the input resistance of the above circuit

1.  24K

2.  240K

3.  10K

4.  48K

4

10K

Explanation :
No Explanation available for this question

# For a feedback amplifier, the open loop transfer function has 3 poles at 100krads/s, 1mrad/s and 10Mrad/s. Low frequency open loop gain is 1000 and feedback factor is 1. Is the amplifier stable

1.  Yes

2.  No

3.  Data missing

4.  Can’t say

4

No

Explanation :
No Explanation available for this question

# What is the small signal voltage gain (AV)

1.  -100

2.  -99

3.  101

4.  None of these

4

None of these

Explanation :
No Explanation available for this question

# What are the time constants associated with CB & CS if α=0.98

1.

2.  (1/2πCb), 2πCs

3.

4.  None of these

4

None of these

Explanation :
No Explanation available for this question

# Find the approximate lower cut off frequency of the amplifier

1.

2.

3.  1/CB

4.  None of these

4

None of these

Explanation :
No Explanation available for this question

# Current gain of a bipolar transistor drops at high frequencies because of

1.  Transistor capacitances

2.  High current effects in base

3.  Parasitic inductive elements

4.  Early effect

4