# Two perfectly matched silicon transistors are connected as shown below. The value of I is

1.  0mA

2.  2.3mA

3.  4.3mA

4.  7.3mA

4

4.3mA

Explanation :
No Explanation available for this question

# The trans-conductance gm of the BJT is 10ms. The value of Rin is

1.  10K

2.  8.3K

3.  5K

4.  2.5K

4

5K

Explanation :
No Explanation available for this question

# The feedback used in the circuit can be classified as

1.  Shunt-series

2.  Shunt-shunt

3.  Series-series

4.  Series-shunt

4

Shunt-shunt

Explanation :
No Explanation available for this question

# The three transistors in the circuit shown below are identical with VBE=0.7V and β=100. The value of VC is

1.  0.2V

2.  2V

3.  7.4V

4.  10V

4

7.4V

Explanation :
No Explanation available for this question

# The figure shown below is a two-stage small signal transistor feedback amplifier. Match list I and list II. LIST I LIST II (A) Capacitor C3 is open (P) All dc voltages normal, V0=0 (B) Capacitor C4 is open (Q) All dc voltages normal, gain of 2nd (C) Capacitor C1 is open (R)Collector of transistor 2 is at VCC, V0=0 (D) RC2 is shorted (S) All dc voltages normal, V0 increases marginally

1.  P-A, Q-B, S-C, R-D

2.  S-A, R-B, P-C, Q-D

3.  S-A, R-B, Q-C, P-D

4.  R-A, S-B, Q-C, P-D

4

S-A, R-B, P-C, Q-D

Explanation :
No Explanation available for this question

# The voltage series feedback in a feedback amplifier leads to

1.  Increase in bandwidth

2.  Decrease in overall gain

3.  Increase in distortion

4.  Both (A) & (B)

4

Both (A) & (B)

Explanation :
No Explanation available for this question

# The block diagrams of two types of half wave rectifiers are shown in the figure. The transfer characteristics of the rectifiers are also with the block It is decided to make a full wave rectifier using above two half-wave rectifiers. The resultant circuit will be

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The input resistance of the circuit shown in the figure assuming an ideal op amp, is

1.  R/3

2.  2R/3

3.  R

4.  4R/3

4

R/3

Explanation :
No Explanation available for this question

1.  Infinity

2.  1M

3.  100K

4.  40K

4

100K

Explanation :
No Explanation available for this question

1.  +100K

2.  -100K

3.  +1M

4.  -1M

4