# As the main problem with silicon rectifiers is the cut-in voltage of 0.7V, can this be really reduced, if we use op amplifiers (op-amp too employ diodes)

1.  Yes

2.  Can’t be said

3.  No, as the same problem persists

4.  None of these

4

Yes

Explanation :
No Explanation available for this question

# A 500W, 220V bulb is supplied with the110V; power consumed by the bulb will be

1.  250W

2.  125W

3.  Slightly more than125W

4.  Slightly less than 125W

4

125W

Explanation :
No Explanation available for this question

# An integrating circuit with T as a pulse duration is suggested. Tick the correct one.

1.  Z1= R,Z2=C,RC< < T

2.  Z1=C,Z2=R,RC< < T

3.  Z1=L,Z2=R,L/R > > T

4.  Z1=R,Z2=L,L/R > > T

4

Z1= R,Z2=C,RC< < T

Explanation :
No Explanation available for this question

# The impulse response of the system described by the differential equationwill be

1.  4δ (t)

2.  e-2tu(t)

3.  e-4t

4.  None of these

4

e-4t

Explanation :
No Explanation available for this question

# A voltage source with an internal resistance Rs, supplied power to load RL, the power delivered to the load varies with RL as

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# A n-type Si-bar is 2 cm long and has a cross section of 2mm2mm. when a 1v of battery id connected across it a current of 8mA flows .Find doping level and drift velocity

1.  1300, 1.92*1015

2.  1500, 2.92*1015

3.  650, 1.92*1015

4.  1500, 1.92*1015

4

650, 1.92*1015

Explanation :
No Explanation available for this question

# A Si sample with ND=1015/cm-3 donors is uniformly optically excited at room temperature such that 1019cm-3 are generated .Find the separation of quasi Fermi levels (Fn-Fp);

1.  0.578ev

2.  0.5ev

3.  0.318ev

4.  None of these

4

0.578ev

Explanation :
No Explanation available for this question

# Which of the following is true (A) i(∞)=iL(∞) (B) i(∞)=i(0) (C) i(∞)=ic(0) (D) i(∞)=V/R Which of the following are true?

1.  Only (A) and (B)

2.  Only (B) and (C)

3.  Only (A), (B), (C)

4.  All of these

4

All of these

Explanation :
No Explanation available for this question

# Which of the following is true for the Fermi dirac Distribution shown at temperature T1&T2

1.  T1>T2

2.  T1

3.  T1=T2

4.  Independent of T

4

T1<T2

Explanation :
No Explanation available for this question

# Analysis for the both network shown above will be equivalent provided that

1.  R1→∞ and R2→0

2.  R1→∞ and R2→∞

3.  R1→0 and R2→∞

4.  R1→0 and R2→0

4