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547.

In figure, the capacitor initially has a charge of 10 Coulomb. The current in the circuit one second after the switch S is closed will be

[2 marks]
(a) 14.7 A
(b) 18.5 A
(c) 40.0 A
(d) 50.0 A

asked in Electrical Engineering, 2004

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548.

In figure, the value of resistance R in Ω is

[2 marks]
(a) 10
(b) 20
(c) 30
(d) 40

asked in Electrical Engineering, 2004

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549.

In figure, the admittance values of the elements in Siemens are Y_R = 0.5 + j0. Y₁= 0-j1.5, Y_c = 0+j0.3 respectively. The value of I as a phasor when the voltage E across the elements is 10∠0°V is

[2 marks]
(a) 1.5 + j0.5
(b) 5 – j18
(c) 0.5+j1.8
(d) 5 – j12

asked in Electrical Engineering, 2004

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550.

In figure, R_a, R_b and R_c are 20Ω, 10Ω and 10Ω respectively. The resistance R₁, R₂ and R₃ in Ω of an equivalent star-connection are

[2 marks]
(a) 2.5, 5, 5
(b) 5, 2.5, 5
(c) 5, 5, 2.5
(d) 2.5, 5, 2.5

asked in Electrical Engineering, 2004

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551.

In figure, the value of the source voltage is

[2 marks]
(a) 12 V
(b) 24 V
(c) 30 V
(d) 44 V

asked in Electrical Engineering, 2004

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552.

The rms value of the periodic waveform given in figure is

[2 marks]
(a) 2√6 A
(b) 6√2 A
(c) √4/3 A
(d) 1.5 A

asked in Electrical Engineering, 2004

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