# The following sequence of instructions are executed by an 8085 microprocessor: 1000 L X I SP, 27 FF 10003 CALL 1066 1066 POP H The contents of the stack pointer (SP) and the HL, resister pair on completion of execution of these instructions are

1.  SP = 27 FF, HL = 1003

2.  SP = 27 FD, HL = 1003

3.  SP = 27 FF, HL = 1006

4.  SP = 27 FD, HL = 1006

4

SP = 27 FD, HL = 1006

Explanation :
No Explanation available for this question

# A dynamic RAM call which hold 5 V has to be refreshed every 20 m secs, so that stored voltage does not fall by more than 0.5 V. It the call has a constant discharge current of 0.1 PA, the storage capacitance of the call is

1.  4 × 10-6

2.  4 × 10-9

3.  4 × 10-12

4.  4 × 10-15

4

4 × 10-15

Explanation :
No Explanation available for this question

# Antenna structure shown in the figure below is

1.  A log-periodic antenna

2.  A driven array

4.  Yagi-antenna

4

A driven array

Explanation :
No Explanation available for this question

# A Yagi antenna in the horizontal pane produces

1.  An end fire directional pattern

3.  A figure eight directional pattern

4.  None of these

4

Explanation :
No Explanation available for this question

# A television receiving antenna that has to use two parasitic elements in addition to the driven folded dipole would preferably use

1.  2 directions

2.  2 reflectors

3.  One director and one reflector

4.  None of these

4

One director and one reflector

Explanation :
No Explanation available for this question

# For the identity AB+C+BC=AB+C the dual form is

1.  (A+B)(+C)(B+C)=(A+B)(+C)

2.

3.

4.

4

(A+B)(+C)(B+C)=(A+B)(+C)

Explanation :
No Explanation available for this question

# The Q output of a J-K flip=flop is ‘1’. The output does not change when a clock-pulse is applied. The inputs J and K will be respectively (X-denotes /+ care state)

1.  0 and X

2.  X and 0

3.  1 and 0

4.  0 and 1

4

X and 0

Explanation :
No Explanation available for this question

# Most commonly used antenna type with TV receivers is the

1.  V-antenna

2.  Rhombic antenna

3.  Loop antenna

4.  Yagi antenna

4

Yagi antenna

Explanation :
No Explanation available for this question

# A unity feedback control system has a forward path transfer function equal to The unit step response of this system starting from rest, will have its maximum value at a time equal to

1.   0 sec

2.  0.56 sec

3.   5.6 sec

4.  Infinity

4

Infinity

Explanation :
No Explanation available for this question

# The block diagram shown below represents

1.  Modulo-3 ripple counter

2.  Modulo-5 ripple counter

3.  Modulo-7 ripple counter

4.  Modulo-7 synchronous counter

4