Electronics and Communication Engineering [ Question No: 1 To 20 ] :
If all the LEDs in a seven segment display are turned on, the number displayed is
Karnaugh map can not be drawn when the number of variables is more than 4
A 4 input AND gate is equivalent to
The basic storage element in a digital system is
Current chopping leads to
A few minutes disturbance in space communications occurs twice a year during Sunblinding when __________ are in line.
The quality of a space-link is measured in terms of the __________ ratio.
A transponder is a satellite equipment which
In a transistor receiver, the use of FET as the first stage amplifier is likely to
In a radio receiver
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if
The ideal characteristics of a stabilizer is
An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be
The resistance of a 125 Ω strain gauge changes by 1 ohm for 4000 micro strain. The gauge factor is
Assertion (A): A hot wire ammeter has a cramped scale.
Reason (R): The heat is proportional to square of current.
If reference sound pressure P0 is 2 x 10-5 N/m2, a sound pressure of 90 dB is equal to
A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
1.2 wattmeter
2.one wattmeter
3.3 wattmeter
Which of the above statements is correct?
and i(t) is a unit step, then V(t) in the steady state is given by
In a pure sample of silicon
In paramagnetic materials
.
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= 4/9.