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601.

The block diagram shown in Fig. gives a unity feedback closed loop control system. The steady state error in the response of the above system to unit step input is

[2 marks]
(a) 25%
(b) 0.75%
(c) 6%
(d) 33%

asked in Electrical Engineering, 2003

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602.

A control system with certain excitation is governed by the following mathematical equation
d²x/dt² + 1/2 * dx/dt + x/18 = 10 + 5e^-4t + 2e^-5t
The natural time constants of the response of the system are
[2 marks]
(a) 2s and 5s
(b) 3s and 6s
(c) 4s and 5s
(d) 1/3s and 1/6s

asked in Electrical Engineering, 2003

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603.

The following program is written for an 8085 microprocessor to add two bytes located at memory addresses 1FFE and 1FFF.
LXI H, 1FFE
MOV B, M
INR L
MOV A, M
ADD B
INR L
MOV M, A
XOR A
On completion of the execution of the program, the result of addition is found [2 marks]
(a) in the register A
(b) at the memory address 1000
(c) at the memory address 1F00
(d) at the memory address 2000

asked in Electrical Engineering, 2003

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604.

A memory system has a total of 8 memory chips, each with 12 address lines and 4 data lines. The total size of the memory system is [2 marks]
(a) 6 kbytes
(b) 32 kbytes
(c) 48 kbytes
(d) 64 kbytes

asked in Electrical Engineering, 2003

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605.

An X-Y flip flop, whose Characteristic Table is given below is to be implemented using a J-K flip flop

X Y Q_n+1

0 0 1

0 1 Q_n

1 0 Q_n

1 1 0

This can be done by making [2 marks]
(a) J = X, K = Y
(b) J = X ,K = Y
(c) J = Y, K = X
(d) J = Y , K = X

asked in Electrical Engineering, 2003

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606.

The shift register shown in Fig. 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 left most position (msb). After how many clock pulses will the content of the shift register become 1010 again?

[2 marks]
(a) 3
(b) 7
(c) 11
(d) 15

asked in Electrical Engineering, 2003

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792 1 ...‹‹99 100101 102 103 ›› ... 132

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