List of top Electronics and Communication Engineering Questions asked in AP PGECET

Primary advantage of a crystal oscillator is that ________.
For a base current of 10 \(\mu\)A, what is the value of collector current in common emitter, if \(\beta = 100\)?
A voltage source of 300 V has internal resistance of 4\(\Omega\) and supplies a load having the same resistance. The power absorbed by the load is
The current flowing through an unloaded voltage divider is called the ________.
In superposition theorem, voltage source is replaced by ________ and current source by ________.
In AM_______.
An antenna has directivity of 100 and operates at 150 MHz. The maximum effective aperture is
A phase lag-lead network introduces in the output_______.
If carrier and modulating frequency are 100 kHz and 5 kHz respectively, the bandwidth of AM transmission will be _______.
Determine the Laplace transform of \(x(t) = (t^2 - 2t)u(t - 1)\)
In a simple RC high-pass filter, the desired roll-off frequency is 15 Hz and \(C = 10\ \mu F\). The value of \(R\) would be _______.
The maximum power efficiency of an AM modulator is _______.
The envelope detector is a/an _______.
Changes in temperature will affect the level of _______.
The medium which reflects high frequency radio waves back to the earth’s surface is called _______.
The binary code of $(21.125)_{10}$ is _______.
As per Boolean algebra, (A + B)(A + C) = _______.
For the SOP expression $A\overline{B}C + \overline{A}BC + AB\overline{C}$, how many 1s are in the truth table’s output column?
An FM signal having a modulation Index of $M$ is passed through a frequency tripler. The FM signal at the output of tripler will have a modulation index of _______.
Three identical amplifiers with each one having a voltage gain of 50, input resistance of 1 kΩ and output resistance of 250 Ω are cascaded. The open circuit voltage gain of the combined amplifier is
In the circuit shown below, the Zener diode is ideal and Zener voltage is 6V. The output voltage \( V_o \) (in volts) is
Zener diode is ideal and Zener voltage is 6V
One example of the use of an S-R flip-flop is
The circuit shown in Figure is equivalent to a load of
Figureisequivalenttoaloadof
In QAM, both ______ of a carrier frequency are varied.
The following multiplexer gives the logic gate of a/an _____
multiplexer gives the logic gate