# The ac output voltage Vac is

1.   0.25 cos(ωt)mV

2.  1 cos (ωt)mV

3.  2cos (ωt) mV

4.  22cos(ωt)mV

4

1 cos (ωt)mV

Explanation :
No Explanation available for this question

# How many gates (minimum) are needed for a 3 – bit – up- counter using standard binary and using T flip –flops Asuume ulimited fan-in

1.   4

2.  3

3.  2

4.  1

4

2

Explanation :
No Explanation available for this question

# The circuit shown in the figure converts

1.  BCD to binary code

2.  Binary to excess -3 code

3.  Excess -3 to Gray code

4.  Gray to Binary code

4

BCD to binary code

Explanation :
No Explanation available for this question

# A sequential circuit D flip-flop and logic gates is shown in the figure where X and Y are the inputs and Z is the output. The circuits is

1.  S-R FF with inputs X = R and Y = S

2.  S- R FF with inputs X = S and Y = R

3.  J – K FF with inputs X = J and Y = K

4.  J – K FF with inputs X = K and Y = J

4

J – K FF with inputs X = K and Y = J

Explanation :
No Explanation available for this question

# The current gain of a BJT is

1.   gm ro

2.   gm/ro

3.  gmrπ

4.  gm/rπ

4

gmrπ

Explanation :
No Explanation available for this question

# The digital block in figure realized using two positive edge triggered D – flip flop. Assume that for t < t0, Q1 = Q2 = 0. The circuit in the digital block is given by

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The circuit shown in figure

1.  Is MOD -2 counter

2.  Is MOD -3 counter

3.  Generate sequence 00,10,01,00….

4.  Generate sequence 00,10,00,10,00……

4

Is MOD -3 counter

Explanation :
No Explanation available for this question

# The mod number of the asynchronous counter shown in the figure is

1.  24

2.  48

3.  25

4.  36

4

24

Explanation :
No Explanation available for this question

# In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.The value of current I0 is approximately

1.  20

2.  3

3.  40

4.   50

4

40

Explanation :
No Explanation available for this question

1.  fc/8

2.  fc/6

3.  fc/3

4.  fc/2

4