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751.

A 100µA ammeter has an internal resistance of 100Ω. For extending its range to measure 500µA, the shunt required is of resistance (in Ω)
[2 marks]
(a) 20.0
(b) 22.22
(c) 25.0
(d) 50.0

asked in Electrical Engineering, 2001

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752.

The asymptotic approximation of the log-magnitude versus frequency plot of a minimum phase system with real poles and one zero is shown in Fig. Its transfer functions is

[2 marks]
(a) 20(s+5)/[s(s+2)(s+25)]
(b) 10(s+5)/[(s+2)² (s+25)]
(c) 20(s+5)/[s²(s+5)(s+25)]
(d) 50(s+5)/[s²(s+2)(s+25)]

asked in Electrical Engineering, 2001

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753.

Given the relationship between the input u(t) and the output y(t) to be

the transfer function Y(s)/U(s) is [2 marks]
(a) 2e^-2s/(s+3)
(a) (s+2)/(s+3)²
(a) (2s+5)/(s+3)
(a) (2s+7)/(s+3)²

asked in Electrical Engineering, 2001

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754.

The conductors of a 10 km long, single phase, two wire line are separated by a distance of 1.5m. The diameter of each conductor is 1 cm. If the conductors are of copper, the inductance of the circuit is
[2 marks]
(a) 50.0 mH
(b) 45.3 mH
(c) 23.8 mH
(d) 19.6 mH

asked in Electrical Engineering, 2001

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755.

A power system has two synchronous generators. The Governor-turbine characteristics corresponding to the generators are
P₁ = 50(50 – f), P₂ = 100(51 – f)
Where f denotes the system frequency in Hz, and P1 and P2 are, respectively, the power outputs (in MW) of turbines 1 and 2. assuming the generators and transmission network to be lossless, the system frequency for a total load of 400 MW is [2 marks]
(a) 47.5 Hz
(b) 48.0 Hz
(c) 48.5 Hz
(d) 49.0 Hz

asked in Electrical Engineering, 2001

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756.

Consider the model shown in Fig. of a transmission line with a series capacitor at its mid-point. The maximum voltage on the line is at the location

[2 marks]
(a)P₁
(b)P₂
(c)P₃
(d)P₄

asked in Electrical Engineering, 2001

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