# If βDC is increased by 10%, then collector-to-emitter voltage drop

1.  increases by less than or equal to 10%

2.  decreases by less than or equal to 10%

3.  increases by more than 10%

4.  decreases by more than 10%

4
Correct Answer :

decreases by less than or equal to 10\%

Explanation :
No Explanation available for this question

# The small-signal gain of the amplifier vc/vs is

1.  -10

2.  -5.3

3.  5.3

4.  10

4
Correct Answer :

-10

Explanation :
No Explanation available for this question

# The following binary values were applied to the X and Y inputs of the NAND latch shown in the figure in the sequence indicated below :  X = 0, Y = 1; X = 0; Y = 0; X = 1, Y = 1  The corresponding stable P, O outputs will be

1.  P = 1, Q = 0; P = 1, Q = 0; P = 1, Q = 0 or P = 0, Q = 1

2.  P = 1, Q = 0; P = 0, Q = 1 or P = 0, Q = 1; P = 0, Q = 1

3.  P = 1, Q = 0; P = 1, Q = 1; P = 1, Q = 0 or P = 0,Q = 1

4.  P = 1, Q = 0; P = 1, Q = 1; P = 1, Q= 1

4
Correct Answer :

P = 1, Q = 0; P = 1, Q = 1;

P = 1, Q = 0 or P = 0,Q = 1

Explanation :
No Explanation available for this question

# A linear system is described by the following state equationX(t) = AX(t) + BU(t) , The state-transition matrix of the system is

1.

2.

3.

4.

4
Correct Answer :

Explanation :
No Explanation available for this question

# For the circuit shown, the counter state (Q1 Q0) follows the sequence

1.  00, 01, 10, 11, 00.....

2.  00, 01, 10, 00, 01.....

3.  00, 01, 11, 00, 01.....

4.  00, 10, 11, 00, 10.....

4
Correct Answer :

00, 01, 10, 00, 01.....

Explanation :
No Explanation available for this question

# An 8255  chip  is  interfaced  to an 8085 microprocessor  system as an  I/O mapped  I/O as shown in the figure. The address lines A0 and A1 of the 8085 are used by the 8255 chip to decode  internally  its  three ports and  the Control  register. The address  lines A3  to A7  as well as the IO   signal are used for address decoding. The range of addresses for which the 8255 chip would get selected is

1.  F8H — FBH

2.  F8H — FCH

3.  F8H — FFH

4.  F0H — F7H

4
Correct Answer :

F8H — FFH

Explanation :
No Explanation available for this question

# The point P in the following figure is stuck-at-1. The output f will be

1.

2.

3.

4.  A

4
Correct Answer :

A

Explanation :
No Explanation available for this question

# A two-port network is represented by ABCD parameters given by If port-2 is terminated by RL, then input impedance seen at port-1 is given by

1.  (A + BRL)/(C + DRL)

2.  (ARL + C)/(BRL + D)

3.  (DRL + A)/(BRL + C)

4.  (B + ARL)/(D + CRL)

4
Correct Answer :

(B + ARL)/(D + CRL)

Explanation :
No Explanation available for this question

# Consider the function f(t) having Laplace transform   The final value of f(t) would be

1.  0

2.  1

3.  -1 ≤ f(∞) ≤ 1

4.  ∞

4
Correct Answer :

-1 ≤ f(∞) ≤ 1

Explanation :
No Explanation available for this question

# The 3 - dB bandwidth of the low-pass signal e-t  u(t), where u(t) is the unit step function, is given by

1.  (1/2π) Hz

2.  1/2∏

3.  ∞

4.  1 H

4
Correct Answer :

(1/2π) Hz

Explanation :
No Explanation available for this question

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