List of top Electronics and Communication Engineering Questions asked in AP ECET ECE

The input impedance of short circuited lossless line of length less than quarter wavelength is

If the full-scale deflection current of a multimeter is \(50\,\mu A\), its sensitivity is

A lossless line will be distortionless if the phase shift

In ideal transmission line with matched load, the VSWR and reflection coefficient are respectively

The total capacitance across points 1 and 2 in the circuit shown is

Which one of the following represents the total number of faces in the given graph

Output remains half of input when output resistance is

The total phase shift of loop in phase shift oscillator is

An amplifier having zero dB bandwidth of \(20\,kHz\) followed by a narrow band pass filter having \(10\,kHz\). The overall lower frequency is numerically equal to

In the circuit shown, the voltage across capacitor is

For RLC circuit shown below, the rms voltage across capacitor is

Find the Norton equivalent of the circuit given below

For a fixed bias circuit the stability factor is

Most commonly used bias in BJT amplifier circuit is

The lower cut-off frequency of \(N\) cascaded stages is given by

The circuit shown in the figure is a

The main advantage of using crystal oscillator is

In field effect device if it is enhanced MOSFET for region \(V_{GS} \lt V_T\) it corresponds to region

A JFET

Compared to bipolar junction transistor, JFET has

The junction capacitance of a PN junction depends on

For a transistor if \(\alpha = 0.98\) and emitter current is \(2.8\,mA\), then the collector current is

A conductor acquires excess electrons has individual voltage gain of \(25 \times 10^4\). Its overall gain in dB is

The gain of an amplifier with positive feedback is given by the relation

The temperature coefficient of a metal is ___ and that of a semiconductor is ___ respectively