QUESTIONS CARRY TWO MARKS EACH.
A generator with constant 1.0 p.u. terminal voltage supplies power through a step-up transformer of 0.12 p.u. reactance and a double-circuit line to an infinite bus bar as shown in the figure. The infinite bus voltage is maintained at 1.0 p.u.Neglecting the resistances and suspectances of the system,the steady state stability power limit of the system is 6.25p.u. If one of the double-circuit is tripped, then resulting steady state stability power limit in p.u. will be
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Solution
QUESTIONS CARRY TWO MARKS EACH.
A 10-bit ADC with full-scale output voltage of 10.24 V is designed to have a ±LSB/2 accuracy. If the ADC is calibrated at 25ºC and the operating temperature ranges from 0ºC to 50ºC, then the maximum net temperature coefficient of ADC should not exceed _________.
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Solution
QUESTIONS CARRY TWO MARKS EACH.
The initial contents of the 4 bit serial-in parallel-out, right-shift,shift regsiter shown in,fig. is 0110. After three clock pulses are applied, the contents of the shift register will be
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Solution
4 bit SIPO
Pulse 1XOR (1, 0) = 1 1011
2 XOR (1, 1) = 0 0101
3 XOR (0, 1) = 1 1010
The contents with be 1010
QUESTIONS CARRY TWO MARKS EACH.
The mirrored current I of the circuit given below is
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Solution
QUESTIONS CARRY TWO MARKS EACH.
The shift register shown in the given figure is initially loaded with the bit pattern 1010. Subsequently, the shift register is clocked, and with each clock pulse the pattern gets shifted by one bit position to the right. With each shift, the bit at the serial input is pushed to the msb position. After how many clock pulses will the content of the shift register become 1010 again?
QUESTIONS CARRY TWO MARKS EACH.
In the circuit given below, SCR2 is turned ON, then
QUESTIONS CARRY TWO MARKS EACH.
Figure shown in thyristor with the standard terminations of anode (A),cathode(K), gate (G) and the different junctions named J1, J2 and J3. When the thyristor is turned on and blocking
QUESTIONS CARRY TWO MARKS EACH.
The circuit in the figure shows zener regulated dc power supply. The zener diode is ideal. The minimum value of RL down to which the output voltage remain constant, is_______ Ω.
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Solution
QUESTIONS CARRY TWO MARKS EACH.
In the circuit shown in the figure, the maximum current in the main SCR can be (given I0= 70.7)
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Solution
QUESTIONS CARRY TWO MARKS EACH.
If transistors in the figure below have high values of β and a VBE of 0.65 volt,then current I, flowing through the 2 kilo ohms resistance will be _________ mA.
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Solution