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Un-Answered Questions { Engineering }

The output of an AM detector goes directly to the A IF amplifier B Mixer C Audio Amplifier D Loudspeaker

1948


A PLL maintains lock by comparing A The phase of two signals B The frequency of two signals C The amplitude of two signals D None of these

2364


A good op-amp has A Very high bandwidth B Narrow bandwidth C High selectivity D All of these

1910


The loss of precision in quantity is called A Down time B Delay C Unavoidable delay D None of these

2014


The positive clipper can be easily converted into negative clipper by A Reversing diode and changing the polarity of reference voltage B Reversing diode only C Changing the polarity D None of these

3874


....................... regulator operates the power transistors as high frequency on/off switch. A Series B Short C Switching D None of these

1780


How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V

2138


The magnitude of the gain or integrator transfer function using op-amp is A WR1Cf B -1/WR1Cf C -WR1Cf D 1/WR1Cf

1944


If R1=R2, then B=0.5, the total time T of square wave in astable multivibrator using op-amp is A T=RC B T=2 RC ln 3 C T=2 RC ln 2 D T=2RC ln (1+ 0.5)

2418


how to get bearing & winding temperature of an induction motor?

2034


why odd number of lines used for scanning

2211


What happen if we apply square wave or traiangular waveform voltage to the transformer primary winding instead of sinusoidal wave?

2170


There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?

1967


Transmission voltage is kept 11KV,33KV,66KV,132KV,220KV due to form factor. What happen to 400KV and 765KV transmission voltage?

2177


new 90kw motor installed so how I purchased cable ,fuse,etc please give me technic for cable selected why always capacitor delta connection

1821