List of top Electronics and Communication Engineering Questions

Which of the following signals are generated by Wien-bridge oscillators?

Three heaters have resistances \(30\Omega, 60\Omega\) and \(20\Omega\) respectively. The p.d. across the 60\(\Omega\) and 30\(\Omega\) resistors respectively when they are connected in series and supply voltage is 600V is

Resistances can be measured with the help of

Which of the following is a temperature measurement element?

The function of Q-meter is to measure

The horizontal plates of CRO is supplied with following to observe the waveform

A transmission line has a VSWR of 2 then the reflection coefficient is

In broadcast television, the number of scanning per frame is chosen to be an odd number to

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

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

The bandwidth of a tuned circuit is

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

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

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

Output remains half of input when output resistance is

A lossless line will be distortionless if the phase shift

In the circuit shown, the voltage across capacitor 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

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

The total phase shift of loop in phase shift oscillator is

Find the Norton equivalent of the circuit given below

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

The circuit shown in the figure is a

For a fixed bias circuit the stability factor is

Most commonly used bias in BJT amplifier circuit is