Assertion (A): Decoder is not a combinational circuit. Reason (R): Every memory element of semi conductor form has a decoder. | |
A. | Both A and R are correct and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are correct but R is not correct explanation of A [Correct Answer] |
C. | A is true, R is false [Wrong Answer] |
D. | A is false, R is true [Wrong Answer] |
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Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
⇒ Dynamic range of hi-fi system is at least
150 dB
120 dB
80 dB
40 dB
⇒ In the signal flow graph of figure, y/x equ
3
42857
2
None of the above
⇒
Assertion (A): To add 8 bit words, two 1C 74181 can be cascaded.
Reason (R): In 1C 74181 a sum greater than 15 leads to high carry out.
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct R is wrong
A is wrong R is correct
⇒ In the basic series inverter circuit, the source current has
low harmonic content
high harmonic content
low or high harmonic content depending on firing angle
zero harmonic content
⇒ T.V. broadcasting based on
line of sight communication
ionospheric propagation
ground wave
medium wave
⇒ The D.C. alpha(a) of a transistor is approximately
unity
10 to 50
100 to 500
1000 to 5000
⇒ The minimum sampling frequency in sample/sec. required to reconstruct the following signal from its samples wuthout distor
2 x 10^{3}
4 x 10^{3}
6 x 10^{3}
8 x 10^{3}
⇒ A periodic voltage has following values for equal time intervals changing suddenly from one value to next, 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, -5, -10 etc. then rms value of the waveform is
31 volt
32 volt
insufficient data
none
⇒ 1011_{2} x 101_{2} = __________ _{10}
55
45
35
25
⇒ Figure shows characteristics curves for bipolar transistor. These curves
output characteristics of n-p-n transistor (common base)
output characteristics of p-n-p transistor (common base)
output characteristics of n-p-n transistor (common emitter)
output characteristics of p-n-p transistor (common emitter)
⇒
Assertion (A): Standard deviation is the abscissa of a point of inflection on the probability curve.
Reason (R): The equation for probability curv
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true
⇒ Compared to bipolar junction transistor, a JFET has
lower input impedance
high input impedance and high voltage gain
higher voltage gain
high input impedance and low voltage gain
⇒ The theoretical maximum efficiency of a half wave diode rectifier is
0.406
0.5
0.812
slightly less than 100%
⇒ Ferrities are particularly suited for high frequency applications because of their
low distortion
low eddy current loss
high conductivity
high mobility
⇒ Antiferromagnetic materials do not have permanent dipoles.
TRUE
FALSE
⇒ The superposition theorem is applicable to
linear, non-linear and time variant responses
linear and non-linear resistors only
linear responses only
none of the above
⇒ An arrangement of several individual antennas to spaced and phased that their individual contributions combine in one preferred direction and cancel in all other directions, to get greater directive gain or directivity, is known as
directional radiation of antennas
antenna gain stability
array of antennas
none of the above
⇒ The most commonly used logic family is
ECL
TTL
CMOS
PMOS
⇒ Read the following statements about Excel
- It supports many arithmetic functions like SUM, ABS, EXP, INT, MOD etc.
- It supports many trigonometric functions.
- It supports IRR function to calculate interest rate.
- It supports PV function to calculate the present value of future receipts.
All
1, 2 and 3 only
1, and 2 only
1 only
⇒ The attraction between the nucleus and valence electron of copper atom is
zero
weak
strong
either zero or strong
⇒ The thin parallel wires are carrying current along the same direction. The force experienced by one due to the other is
parallel to the lines
perpendicular to the lines and attractive
perpendicular to the lines and repulsive
zero
⇒
Match the following:
List I (Laws of Boolean) | List II (Relation algebra) | ||
---|---|---|---|
A. | Distributive law | 1. | x + x = x |
B. | DeMorgans law | 2. | x(y + z) = xy + xz |
C. | Idempotent law | 3. | (x) = x |
D. | Involution law | 4. | (x + y) = xy |
A-1, B-2, C-3, D-4
A-2, B-4, C-1, D-3
A-3, B-4, C-1, D-2
A-4, B-1, C-2, D-3
⇒ In 8085 microprocessor, what is the memory address stored on the stack, when the program is interrup
0210 H
0.211 H
0118 H
020 FH
⇒ As regards single phase dual converter
the change in operation from one quadrant to the other is faster in non-circulating current mode
the change in operation from one quadrant to the other is faster in circulating current mode
the time response to change in operation from one quadrant to other is the same in both the modes
the time response to change in operation from one quadrant to the other may be faster in any of the two modes
⇒ Identical telephone numbers in different parts of a country are distinguished by their
area codes
office codes
access digits
language codes
⇒ Let f(A, B) = A ⊕ B; then the simplified form of the function f(f(x ⊕ y, z)w) is
(x ⊕ y ⊕ z)w
x ⊕ y ⊕ z ⊕ w
(x ⊕ y ⊕ z) + w
none of these
⇒
Assertion (A): CMOS devices have very high speed.
Reason (R): CMOS devices have very small physical size and simple geometry.
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true
⇒ The threshold voltage of an n-channel enhancement mode MOSFET is 0.5 when the device is biased at a gate voltage of 3V. Pinch off would occur at a drain voltage of
1.5 V
2.5 V
3.5 V
4.5 V
⇒ If u is input, y is output and a, b are constants, the system y = au + b
is linear
is nonlinear
may be linear or nonlinear dependig on values of a and b
may be linear or nonlinear depending on value of u
⇒ The constellation diagram of a modem has four states as shown in the figure given below. What is the bit rate of this mod
Two times its band rate
Four times its band rate
Same as band rate
Sufficient information is not given to give the answer