Electronics and Communication Engineering [ Question No: 1 To 20 ] :
A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is
Which of the following is not a characteristic of a flip flop?
The number of cells in a 4 variable K map is
Wired AND connection can be used in TTL with totem pole output.
ROC of sequence x[n] = (3)n ∪[n] + (4)n ∪[- n - 1]
The trignometric Fourier series of an even function of time does not have
Assertion (A): Snubber circuit has an RC series circuit in parallel with SCR
Reason (R): Voltage across a capacitor can not change instantaneously.
A dc circuit breaker must use
In single phase half wave regulator, the average current over one full cycle
The terminals of a power BJT are called
In satellite communication, highly directional antennas are used to
Assertion (A): A slight change in pole-zero configuration can cause only minor changes in root locus configuration.
Reason (R): Asymptotes show the behaviour of root loci for |s| >> 1
Assertion (A): If minimum phase system has a gain margin of 8 dB and phase margin of 21°, the system is stable.
Reason (R): For a minimum phase system both GM and PM must be positive for the system to be stable.
Robotic manipulator arms mostly use
Assertion (A): For large signal variations an amplifier circuit has to be analysed graphically
Reason (R): The output characteristics of a transistor is nonlinear.
A 0-200 V voltmeter has an accuracy of 0.75% of full scale reading. If voltage measured is 100 V, the error is
Dielectric constant of transformer oil is about
Assertion (A): Ferroelectric materials have spontaneous polarization.
Reason (R): Above curie temperature, ∈ = 
for ferro-electric materials.
Assertion (A): Magnetic susceptibility of diamagnetic materials is much less than that of paramagnetic materials.
Reason (R): For diamagnetic as well as paramagnetic materials, μr is nearly equal to 1.
If a sample of germanium and a sample of silicon have the same impurity density and are kept at room temperature
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