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649.

A Manganin swamp resistance is connected in series with a moving coil ammeter consisting of a milli-ammeter and a suitable shunt in order to
[2 marks]
(a) minimize the effect of temperature variation
(b) obtain large deflecting torque
(c) reduce the size of the meter
(d) minimize the effect of stray magnetic fields

asked in Electrical Engineering, 2003

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650.

A second order system starts with an initial condition of without any external input. The state transition matrix for the system is given by . The state of the system at the end of 1 second is given by [1 mark]

asked in Electrical Engineering, 2003

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651.

A lead compensator used for a closed loop controller has the following transfer function K(1+ s/b)/(1+ s/a). For such a lead compensator
[1 mark]
(a) a < b
(b) b < a
(c) a > Kb
(d) a < Kb

asked in Electrical Engineering, 2003

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652.

A control system is defined by the following mathematical relationship
d²x/dt² + 6dx/dt + 5x = 12(1-e^-2t)
The response of the system as t → ∞ is [1 mark]
(a) x = 6
(b) x = 2
(c) x = 2.4
(d) x = -2

asked in Electrical Engineering, 2003

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653.

When a program is being executed in an 8085 microprocessor, its Program Counter contains [1 marks]
(a) the number of instructions in the current program that have already been executed
(b) the total number of instructions in the program being executed
(c) the memory address of the instruction that is being currently executed
(d) the memory address of the instruction that is to be executed next

asked in Electrical Engineering, 2003

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654.

Fig shows a 4 to 1 MUX to be used to implement the sum S of a 1-bit full adder with input bits P and Q and the carry input C_in. Which of the following combinations of inputs to I₀, I₁, I₂ and I₃ of the MUX will realize the sum S?

[1 mark]

asked in Electrical Engineering, 2003

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