By John Bird

During this ebook John fowl introduces electric rules and expertise via examples instead of idea - allowing scholars to boost a legitimate knowing of the rules wanted by way of technicians in fields reminiscent of electric engineering, electronics and telecommunications. No prior heritage in engineering is thought, making this an incredible textual content for vocational classes and introductory classes for undergraduates.

This new version of Electrical and digital rules and Technology has been introduced totally according to the hot BTEC nationwide requirements within the U.K. for the devices: electric and digital rules and extra electric and digital ideas, and the corresponding AVCE devices. it's also designed to hide the necessities of Intermediate GNVQ and the recent BTEC First specifications.

At periods in the course of the textual content evaluate papers are supplied, that are perfect for exams or homeworks. those are the single difficulties the place solutions are usually not supplied within the e-book, yet totally labored options can be found to academics in simple terms as a loose obtain from

* A student-friendly textual content that doesn't suppose any history in engineering
* study via examples: over six hundred difficulties, four hundred labored examples and review papers
* contains evaluation papers - labored suggestions in loose lecturer's guide

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Extra resources for Electrical and Electronic Principles and Technology

Example text

For example, if a brass valve is fitted to a heating system made of steel, corrosion will occur. The effects of corrosion include the weakening of structures, the reduction of the life of components and materials, the wastage of materials and the expense of replacement. Corrosion may be prevented by coating with paint, grease, plastic coatings and enamels, or by plating with tin or chromium. , plated with zinc, the layer of zinc helping to prevent the iron from corroding. f. d. e. the cell is on ‘no load’).

35 shows three lamps, each rated at 240 V, connected in series across a 240 V supply. e. 80 V across it and thus each lamp glows dimly. (ii) If another lamp of similar rating is added in series with the other three lamps then each lamp (i) Each lamp has 240 V across it and thus each will glow brilliantly at their rated voltage. (ii) If any lamp is removed from the circuit or develops a fault (open circuit) or a switch is opened, the remaining lamps are unaffected. (iii) The addition of further similar lamps in parallel does not affect the brightness of the other lamps.

32, find (a) V1 , (b) V2 , without calculating the current flowing. 32 TLFeBOOK SERIES AND PARALLEL NETWORKS 9 Determine the currents and voltages indicated in the circuit shown in Fig. 5 A, I3 D 1 23 A, I4 D 56 A I5 D 3 A, I6 D 2 A, V1 D 20 V, V2 D 5 V, V3 D 6 V] 10 Find the current I in Fig. e. 60 V across it and each now glows even more dimly. e. an open circuit) or if the switch is opened, then the circuit is broken, no current flows, and the remaining lamps will not light up. (iv) Less cable is required for a series connection than for a parallel one.

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