GATE EC question library

In a multicavity magnetron, strapping is employed primarily

The beamwidth-between-first null of uniform linear array of $\mathrm{N}$ equally-spaced (element spacing $=d$ ), equally-excited antennas is determined by

Two dissimilar antennas having their maximum directivities equal,

Which of the following statements is/are correct?

A transmission line whose characteristic impedance is a pure resistance

Source encoding in a data communication system is done is order to

Coherent demodulation of $\text{FSK}$ signal can be effected using

The bit stream $01001$ is differentially encoded using $\text{'Delay and Ex OR'}$ scheme for $\text{DPSK}$ transmission. Assuming the reference bit as a $'1'$ and assigning phases of $'0'$ and $\pi$ for $1$’s and $0$’s respectively, in the encoded sequence, the transmitted phase sequence becomes

For a random variable $x$ following the probability density function, $\mathrm{p}(x)$, shown in given figure the mean and the variance are, respectively,

The maximum power efficiency of an $\text{AM}$ modulator is

If $G(f)$ represents the Fourier transform of a signal $g$ (t) which is real and odd symmetric in time, then

Which of the following signals is/are periodic?

Dual-slope integration type Analog-to-digital converters provide

In an $8085$ microprocessor system with memory mapped $\text{I} / \mathrm{O}$,

The initial contents of the $4$-bit serial-in-parallel-out, right-shift, Shift. Register shown in given figure is $0110$. After three clock pulses are applied, the contents of the Shift Register will be

Given figure shows the circuit of a gate in the Resistor Transistor Logic $\text{(RTL)}$ family. The circuit represents a

Choose the correct statement(s) from the following

The logic realized by the circuit shown in given figure is

The $6 \mathrm{~V}$ Zener diode shown in given figure has zero Zener resistance and a knee current of $5 \mathrm{~mA}$. The minimum value of $R$ so that the voltage across it does not fall below $6 \mathrm{~V}$ is

The circuit of given figure, uses an ideal op amp. For small positive values of $V_{\text{in' }}$, the circuit works as