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Digital Electronics
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Question
In register index addressing mode the effective address is given by
Options
A. index register value
B. sum of the index register value and the operand
C. operand
D. difference of the index register value and the operand
Correct Answer
sum of the index register value and the operand
Explanation
4 = 2
2
, in up scaling digit will be shifted by two bit in right direction.
More questions
1. In which region of a CE bipolar transistor is collector current almost constant?
Options
A. Saturation region
B. Active region
C. Breakdown region
D. Both saturation and active region
Show Answer
Scratch Pad
Discuss
Correct Answer: Active region
Explanation:
It is used as amplifier when it operates in this region.
2. The Q factor of a waveguide resonator is given by (?
0
is resonant frequency, U is energy storage and W
L
is the power loss)
Options
A.
B.
C. Q = ?
0
UW
L
D.
Show Answer
Scratch Pad
Discuss
Correct Answer:
3. In a resistance strain gauge, G = 2, stress = 1050 kg/cm
2
, R = 1000 ?. The value of ?R will be
Options
A. 2 ?
B. 3 ?
C. 4 ?
D. 1 ?
Show Answer
Scratch Pad
Discuss
Correct Answer: 1 ?
Explanation:
.
4. In a broadcast superheterodyne receiver
Options
A. the local oscillator operates below the signal frequency
B. local oscillator frequency is normally double the IF
C. RF amplifier normally works at kHz above the carrier frequency
D. mixer input must be tuned to the signal frequency
Show Answer
Scratch Pad
Discuss
Correct Answer: mixer input must be tuned to the signal frequency
5. FM receivers using the standard 88 to 108 MHz band use IF of
Options
A. 8 MHz
B. 9.9 MHz
C. 10.7 MHz
D. 12.2 MHz
Show Answer
Scratch Pad
Discuss
Correct Answer: 10.7 MHz
6. Which one of the following potential does not satisfy Laplace's equations?
Options
A.
v
= 10
xy
B.
v
=
p
cos ?
C.
D.
v
=
f
cos ? + 10
Show Answer
Scratch Pad
Discuss
Correct Answer:
v
=
p
cos ?
Explanation:
.
7. The rate at which information can be carried through a communication channel depends on
Options
A. carrier frequency
B. bandwidth
C. transmission loss
D. transmitted power
Show Answer
Scratch Pad
Discuss
Correct Answer: bandwidth
Explanation:
Rate of information depends on bandwidth.
8. Generally the wall thickness of rectangular waveguide is
Options
A. about 1-5 mils
B. about 40-100 mils
C. about 0.1 to 0.5 mils
D. about 500 mils
Show Answer
Scratch Pad
Discuss
Correct Answer: about 40-100 mils
9. It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude
Options
A. will increase
B. will decrease
C. will remain constant
D. will reduce to negligible value
Show Answer
Scratch Pad
Discuss
Correct Answer: will decrease
10. Curie Weiss law is
.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
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