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John Rampton 107934
Sep 2010
• Responses: 298
• eBooks: 1

Education

• M.Sc, University of Surrey, UK, 2008
• M.Eng, Open University in the UK, 2004
• B.Sc (hons) 2(2), Leicester University in the UK, 1985

Subjects

• Engineering
• Physics
• Mathematics
• Chemistry

Solution Library

General Electrical Engineering Questions

1. For the circuit given in FIGURE 1 the power factor is 0.72 lagging and the power dissipated is 375 W.
FIG. 1 (see attachment)
Determine the:
(i) apparent power
(ii) reactive power
(iii) the magnitude of the current flowing in the circuit
(iv) the value of the impedance Z and state whether READ MORE »

Engineering / Electrical Engineering / Electronic Engineering » 589000

Write down an expression for the voltage waveform, and sketch the waveforms of the harmonic components.

An a.c. voltage, V, comprises of a fundamental voltage of 100 V rms at a frequency of 120 Hz, a 3rd harmonic which is 20% of the fundamental, a 5th harmonic which is 10% of the fundamental and at a phase angle of 1.2 radians lagging.

(i) Write down an expression for the voltage waveform.
(ii) Sk READ MORE »

Engineering / Electrical Engineering » 366169

Fourier analysis using Excel

The supply current was sampled 1024 times over a very short time interval. The data so obtained is given in column B of the accompanying Excel worksheet (see attached).
This worksheet has been set up to give a graph showing the spectral components of the data.

Question 3
i) Obtain the Fourier READ MORE »

Engineering / Electrical Engineering / Electronic Engineering » 590522

Laplace Circuit Analysis

Please give a full and simplified answer to all parts of question 6 to aid me with revision.

When a force F is applied across the face of the crystal, the current is generated. The interconnecting cable can be represented by a lumped capacitance CC. The input resistance of the amplifier, RL, acts READ MORE »

Engineering / Electrical Engineering / Electronic Engineering » 590523

Damping factor, Damped frequency, Natural frequency

For the waveform shown in attached figure, estimate
(a) the damping factor,
(b) the forced or damped frequency of oscillation, and
(c) the natural or undamped frequency.

Engineering / Electrical Engineering » 404100
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