for the system X=u:y=[4,0]X,with u as unit impulse and with zero initial state,the output,y,becomes

1.  2 e2t

2.  4 e2t

3.  2 e4t

4.  4 e4t

View Answer  
4
Correct Answer :

4 e2t


Explanation :
No Explanation available for this question

The eigen values of the system represented by X= X are

1.  0,0,0,0

2.  1,1,1,1

3.  0,0,0,-1

4.  1,0,0,0

View Answer  
4
Correct Answer :

1,0,0,0


Explanation :
No Explanation available for this question

In the chopper circuit shown in figure the input dc voltage has a constant value  VS.the output voltage Vo is assumed ripple-free.the switch S is operated with a switching time period T and a duty ratio D.what is the value of D at the boundry of continuous and discontinuous conduction of the inductor current iL

1.  D=1-

2.  D=

3.  D=1-

4.  D=

View Answer  
4
Correct Answer :

D=1-


Explanation :
No Explanation available for this question

Figure shows an inverter circuit with a dc source voltage Vs.the semiconductor switches of the inverter are operated in such a manner that the pole voltages V10 and V20 are as shown in figure.what is the rms value of the pole-to-pole voltage V12

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

In the circuit shown in figure the switch is closed at time=0.the steady state value of the voltage Vc is

1.  0 V

2.  10 V

3.  5 V

4.  2.5 V

View Answer  
4
Correct Answer :

5 V


Explanation :
No Explanation available for this question

In the single phase diode bridge rectifier shown in figure the load resistor is R=50Ω.the source voltage is v=200 sin(t),where ?=2π×50 radians per second.The power dissipated in the load resistor R is

1.  

2.  

3.  400 W

4.  800 W

View Answer  
4
Correct Answer :

400 W


Explanation :
No Explanation available for this question

The contents (in Hexadecimal) of some of the memory locations in an 8085A based system below are given below Address Contents ... ... 26FE 00 26FF 01 2700 02 2701 03 2702 04 ... ... The contents of stack pointer (SP),program counter (PC) and (H, L) are 2700H, 2100H and 0000H respectively.When the following sequence of instructions are executed, 2100 H:DAD SP 2101H:PCHL the contents of (SP) and (PC) at the end of execution will be

1.  (PC) = 2102H, (SP) = 270OH

2.  (PC) = 2700H, (SP) = 2700H

3.  (PC) = 2800H, (SP) = 26 FEH

4.  (PC) = 2A02H, (SP) = 2702H

View Answer  
4
Correct Answer :

(PC) = 2700H, (SP) = 2700H


Explanation :
No Explanation available for this question

A waveform generator circuit using OPAMPs is shown in the figure.It produces a triangular wave point 'P' with a peak to peak voltage of 5 V for v1=0 V. If the voltage V1 is made +2.5 V, the voltage waveform at point ‘P’ will become

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

A 230 V, 50 Hz, 4-pole, single-phase induction motor is rotating in the clockwise (forward) direction at a speed of 1425 -rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be

1.  2 Ω

2.  4 Ω

3.  78 Ω

4.  156 Ω

View Answer  
4
Correct Answer :

4 Ω


Explanation :
No Explanation available for this question

A 400 V, 50 Hz, 30 hp .three-phase induction motor is drawing 50 A current at 0.8 power factor lagging. The stator and rotor copper losses are 1.5 kW and 900 W respectively. The friction and windage losses are 1050 W and the core losses are 1200 W. The air-gap power of the motor will be

1.  23.06kW

2.  24.11 kW

3.  25.01 kW

4.  26.21 kW

View Answer  
4
Correct Answer :

25.01 kW


Explanation :
No Explanation available for this question
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