In the given figure, the low frequency π model parameters are rπ and β. The angular frequency due to capacitor CE is given by
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Solution
The value of collector current in below circuit in mA is_______.
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Solution
To calculate the Q point collector current, open circuited the capacitors and calculate the base current.
A 11.8 kV bus bar is fed from three synchronous generators having the following ratings and ratances.
20 MVA, X’= 0.18 pu
60 MVA,X’= 0.1 pu
20 MVA, X’= 0.09 pu
A three phase symmetrical fault occurs on the bus bars.Resistance may be neglected. The bae voltage will be taken as 11.8 kV and base voltmeter as 60 MVA.The fault MVA is________.
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Solution
JEFT in the circuit shown in the given figure has an IDSS = 10 mA and Vp
= 5 V.The value of resistance Rs for a drain current IDSS= 6.4 mA is (select nearest value)
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Solution
For good stabilised biasing of the transistor of the CE amplifier of given figure
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Solution
Minimum number of 2-input NAND gates required to implement Boolean function Z = A\(\overline{B}\)C, assuming that A,B and C are available, is
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two
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three
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five
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six
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Solution
The circuit of given figure uses an ideal op amp. For small positive values of Vin, the circuit works as a/an
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half wave rectifier
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differentiator
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logarithmic amplifier
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exponential amplifier
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Solution
The input –3e2tu (t), where u (t) is the unit step function, is applied to a system with transfer \(\frac{s-2}{s+3}\). If the initial value of the output is –2, then the value of the output at steady state is ________ .
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Solution
The characteristic equation of a control system is given by s6+ 2s5 + 8s4+ 12s3+ 20s2 + 16s+ 16 =0
The number of the roots of the equation which lie on the imaginary axis of s-plane is _________
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Solution
The mirrored current I of the circuit given below is
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11.27
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50.27
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16.27
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10.27
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Solution