List of top Electronics and Communication Engineering Questions asked in Telangana State Post Graduate Engineering Common Entrance Test

Convert a decimal number 3509.14453125 into a hexadecimal number
Threshold voltage at the comparator of 555 timer is approximately
If the input to an OP-AMP comparator is a sine wave, then the output is a
The cut off frequency of the following fourth order filter is
cut off frequency of the following fourth order filter is
Identify the following circuit
Second order Low pass filter
To eliminate cross over distortion in Class B power amplifier, the circuit should have
A 'Class A' Common Emitter amplifier with \(V_{CC} = 20 \text{ V}\) draws a current I = 5A and feed a load of \(40\Omega\) through a step-up transformer N2/N1=3.16. Find the efficiency of the amplifier when it is properly matched for maximum power supply.
Wein bridge oscillator is a
When the negative feedback is applied to an amplifier of gain 100, the overall gain falls to 50. If the same feedback factor is maintained, the value of the amplifier gain required for the overall gain of 75 is
Which of the following is not correct with respect to Darlington amplifier?
The midband gain of an amplifier is 100 and the lower cutoff frequency is 1 KHz. Find the gain of the amplifier at a frequency of 20 Hz.
Half wave and Full wave rectifiers produce nearly identical ____ for equal values of transformer secondary voltage.
The maximum dc output power in a Half wave rectifier occurs when the load resistance is ____ the diode forward resistance.
In a photodiode, light produces
LEDs are based on the principle of
The SiO\(_2\) is grown by exposing the epitaxial layer to an oxygen atmosphere while being heated to about 1000\(^\circ\)C, because Silicon dioxide has the fundamental property of
The rise time of a BJT is 3.5 micro seconds. Find its transition frequency.
An 'n' channel JFET has \(I_{DSS}=8\text{mA}\), \(V_P=-5\text{V}\). Determine the minimum value of \(V_{DS}\) for \(V_{GS}=-2\text{V}\) in the pinch off region.
Choose the wrong one with respect to nMOSFET compared to pMOSFET
Which of the following is not correct, when the collector base junction is reverse biased?
The electrical conductivity of pure semiconductor can be increased by
Phase variation with respect to frequency is given by \( \phi(\omega) = 2\omega^2 + \cos\omega \). Then, group delay of the system is
The LTI system is said to be initially relaxed system when
The frequency response of LTI system is given by the Fourier Transform of the ____ of the system.
Unilateral Z transform of x(n) is equivalent to bilateral Z-transform of