Electronics and Communication Engineering
GATE ECE topic:electronics PYQs
Build your understanding with focused practice from past exam papers.
Questions 351–360 of 715. Imported answers require independent review unless marked reviewed.
Question 16
Open questionECNAT1 markNeeds review
If the vectors
,
and
in
are linearly dependent, the value of
is __________.Log in to check the answer
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Consider the vector field
in a rectangular coordinate system
with unit vectors
,
and
. If the field
is irrotational (conservative), then the constant
(in integer) is __________.Log in to check the answer
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Consider the circuit shown in the figure.
The current
flowing through the
resistor between P and Q (rounded off to one decimal place) is __________ A.Log in to check the answer
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Consider the circuit shown in the figure.
The value of
(rounded off to one decimal place) is __________ V.Log in to check the answer
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An 8-bit unipolar (all analog output values are positive) digital-to-analog converter (DAC) has a full-scale voltage range from 0 V to 7.68 V. If the digital input code is 10010110 (the leftmost bit is MSB), then the analog output voltage of the DAC (rounded off to one decimal place) is __________ V.
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The autocorrelation function
of a wide-sense stationary random process
is shown in the figure. The average power of
is ______.
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Consider a carrier signal which is amplitude modulated by a single-tone sinusoidal message signal with a modulation index of 50%. If the carrier and one of the sidebands are suppressed in the modulated signal, the percentage of power saved (rounded off to one decimal place) is ______.
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A speech signal, band limited to 4 kHz, is sampled at 1.25 times the Nyquist rate. The speech samples, assumed to be statistically independent and uniformly distributed in the range −5 V to +5 V, are subsequently quantized in an 8-bit uniform quantizer and transmitted over a voice-grade AWGN telephone channel. If the ratio of transmitted signal power to channel noise power is 26 dB, the minimum channel bandwidth required to ensure reliable transmission of the signal with arbitrarily small probability of transmission error (rounded off to two decimal places) is ______ kHz.
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A 4 kHz sinusoidal message signal having amplitude 4 V is fed to a delta modulator (DM) operating at a sampling rate of 32 kHz. The minimum step size required to avoid slope overload noise in the DM (rounded off to two decimal places) is ______ V.
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The refractive indices of the core and cladding of an optical fiber are 1.50 and 1.48, respectively. The critical propagation angle, which is defined as the maximum angle that the light beam makes with the axis of the optical fiber to achieve the total internal reflection, (rounded off to two decimal places) is ______ degree.
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