The following sequence represents autocorrelation of a real valued signal. The energy of real valued sequence is given by __________ x(n) = {1, _, 3, _, 5, _, 7, _, 9, 10, _, 8, _, 6, _, 4, _, 2 | |
A. | 2[1^{2} + 2^{2} + 3^{2} + 4^{2} + 5^{2} + 6^{2} + 7^{2} + 8^{2} + 9^{2}] + 10^{2} [Wrong Answer] |
B. | 10 [Correct Answer] |
C. | 10^{2} [Wrong Answer] |
D. | 2[1^{2} + 2^{2} + 3^{2} + 4^{2} + 5^{2} + 6^{2} + 7^{2} + 8^{2} + 9^{2} + 10^{2}] [Wrong Answer] |
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Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
⇒ Integral control action
removes offset
may lead to oscillatory response
both (a) and (b)
neither (a) nor (b)
⇒ The VLF, LF and MF antennas are
horizontally polarized
vertically polarized
non linearly polarized
either (a) or (b)
⇒ When a wave reaches the open circuited end of a line
all the forward energy is reflected by the open circuit
all the forward energy is absorbed by the open circuit
a small portion of energy is radiated into atmosphere and the remaining energy is reflected
either (a) or (b)
⇒ For BJT transistor. The maximum power dissipation is specified as 350 mW if ambient temperature is 25°C. If ambient temperature is 60°C the maximum power dissipation should be limited to about
100 mW
250 mW
450 mW
600 mW
⇒ The current in an RL series circuit is 1 - e^{-t} amperes. Then di/dt is
1 - e^{-t}
- e^{-t}
e^{t}
e^{-2t}
⇒ Two function g_{1}(t) and g_{2}(t) with correlation of 6 has average power of 4 and 5 respectively. The power of g_{1}(t) + g_{2}(t) is
9
21
3
15
⇒ In the signal flow graph of figure, y/x equ
3
42857
2
None of the above
⇒ For a BJT a = 0.98, then β =
0.02
0.5
4.9
48
⇒ In an SCR, the anode current consists of
only holes
only electrons
both electrons and holes
either electrons or holes
⇒ The wave propagation occurs without attenuation in case of a
conductor
semiconductor
perfect dielectric
none of the above
⇒ 2's complement number 00011111 = __________ _{10}
31
-31
11
-11
⇒ Which of the following real expressions is correct in Pascal?
- Z + P * X
(X + Y) (A + B)
Z ** M
Z P * M
⇒ The resolution of an n bit DAC with a maximum input of 5 V is 5 mV. The value of n is
8
9
10
11
⇒ If temperature increases by about 50°, the resistance of thermistor changes to
half of its initial value
twice of its initial value
eight times of its initial value
one eight of its initial value
⇒ In using Nyquist stability criterion it is not necessary to determine closed loop poles.
TRUE
FALSE
⇒ Registers and counters are similar in the sense that they both
count pulses
store binary information
are made from an array of flip-flops and gates integrated on a single chip
are shift registers
⇒ Y = A + A B is the same as
Y = AB
Y = A + B
Y = A + B
Y = A + B
⇒
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
⇒ To make antenna more directional, either its size must be increased or
the number of its feed horns must be increased
the frequency of its transmission must be increased
its effective isotropic radiated power (EIRP) must be increased
its footprint must be increased
⇒ PAL system was proposed first in
USA
Japan
England
Germany
⇒ If transmission bandwidth is doubled in FM, SNR is
doubled
raised four times
decreased four times
halved
⇒ Standard AM radio broadcasts are confined to
MF
HF
VHF
UHF
⇒ A lag compensator is essentially a
low pass filter
high pass filter
band pass filter
either (a) or (b)
⇒ The analog signal given below is sampled at 1200 samples per second. m(t) = 2 sin 120 pt + 3 sin 240 pt + 4 sin 360 pt + 5 sin 480 pt + 6 sin 600 pt + 7 sin 720 pt. The folding (maximum) frequency is __________ .
300 Hz
360 Hz
600 Hz
480 Hz
⇒ What is the major cause of creeping in an energy-meter?
Over compensation for friction
Mechanical vibrations
Excessive voltage across the potential coil
Stray magnetic fields
⇒ RMS value is always higher than average value.
TRUE
FALSE
⇒ Which of the following bus is used to transfer data from main memory to peripheral device?
DMA bus
Output bus
Input bus
Data bus
⇒ The noise figure is
3 dB
6 dB
6.6 dB
12 dB
⇒ The tuned circuit of the oscillator in a simple AM transmitter employs a 50 H coil and a 1 nanofarad capacitor. If the oscillator output is the carrier frequency will be
448 kHz
555 kHz
625 kHz
712 kHz
⇒ IC 74181 performs arithmetic operations when M = 1.
TRUE
FALSE