Q1. A crystal filter is equivalent to
(A) A high Q series resonant circuit
(B) A high Q parallel resonant circuit
(C) A low Q series resonant circuit
(D) A wideband filter

Q2. The amplifier contributing maximum noise in a receiver is
(A) LNA
(B) Video
(C) IF
(D) Audio

Q3. the ASCII code is
(A) 4 bits
(B) 7 bits
(C) 8 bits
(D) 16 bits

Q4. in resonance circuit the power factor at resonance is
(A) zero
(B) unity
(C) 0.5
(D) 3

Q5. the Laplace transform of a unit impulse function is
(A) 1/s
(B) s
(C) 1/(s+1)
(D) 1

Q6. the internal impedance of an ideal voltage source is
(A) low
(B) high
(C) zero
(D) infinity

Q7. a series capacitance used in filter circuit represent s
(A) low pass
(B) band pass
(C) high pass
(D) none

Q8. the loss produced by the insertion of the network or line is referred as
(A) characteristic loss
(B) insertion loss
(C) eddy current loss
(D) hysteresis loss

Q9. in TV transmission the type of modulation used for picture
(A) AM
(B) FM
(C) VSB
(D) SSB

Q10. the aspect ratio in TV receiver equals to
(A) 03:02:00
(B) 02:01:00
(C) 04:03:00
(D) 03:01:00

Q11. the noise figure of ideal receiver is
(A) 0
(B) 1db
(C) 0db
(D) 1

Q12. comparator circuit are used in
(A) adder
(B) differentiator
(C) converting sine to square wave
(D) delay circuit

Q13. a 64 bit word consist of ________ Nibble
(A) 16
(B) 8
(C) 4
(D) 2

Q14. Thermal noise power is proportional to ?
(A) bandwidth only
(B) temperature only
(C) bandwidth and temperature
(D) bandwidth, resistance and temperature

Q15. Probability density function of thermal noise is ?
(A) binomial
(B) Gaussian
(C) Poisson
(D) none of these

Q16. The autocorrelation functions of an energy signal has ?
(A) no symmetry
(B) conjugate symmetry
(C) odd symmetry
(D) even symmetry

Q17. The Fourier transform of a Gaussian time pulse is ?
(A) uniform
(B) a pair of impulse
(C) Gaussian
(D) Rayleigh

Q18. The spectral density of white noise is ?
(A) exponential
(B) uniform
(C) Poisson
(D) Gaussian

Q19. A periodic function of half - wave ssymmetry is necessary ?
(A) an even function
(B) an odd function
(C) neither odd nor even
(D) both of and even

Q20. If the total energy of signal satisfies the condition zero < Energy< infinity is called ?
(A) Power signal
(B) Energy signal
(C) Primary signal
(D) Periodic signal

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