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463.

The output voltage waveform of a three-phase square-wave inverter contains [1 mark]
(a) only even harmonics
(b) both odd and even harmonics
(c) only odd harmonics
(d) only triplen harmonics

asked in Electrical Engineering, 2005

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464.

A three-phase diode bridge rectifier is fed from a 400V RMS, 50 Hz, three-phase AC source. If the load is purely resistive, the peak instantaneous output voltage is equal to [1 mark]
(a) 400 V
(b) 400 √2 V
(c) 400√2/3 V
(d) 400/√3 V

last reply by CpjJwWHV • 13 years ago • asked in Electrical Engineering, 2005

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465.

The conduction loss versus device current characteristic of a power MOSFET is best approximated by [1 mark]
(a) a parabola
(b) a straight line
(c) a rectangular hyperbola
(d) an exponentially decaying function

asked in Electrical Engineering, 2005

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466.

A digital-to-analog converter with a full-scale output voltage of 3.5V has a resolution close to 14 mV. Its bit size is: [1 mark]
(a) 4
(b) 8
(c) 16
(d) 32

asked in Electrical Engineering, 2005

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467.

The digital circuit shown in Fig. works as a

[1 marks]
(a) JK flip-flop
(b) Clocked RS flip-flop
(c) T flip-flop
(d) Ring counter

asked in Electrical Engineering, 2005

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468.

Assume that the N-channel MOSFET shown in Fig. is ideal, and that its threshold voltage is +1.0V. The voltage V_ab between nodes a and b is:

[1 mark]
(a) 5V
(b) 2V
(c) 1V
(d) 0V

asked in Electrical Engineering, 2005

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