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Download Electrical and Electronic Principles and Technology (3rd by John Bird PDF

By John Bird

During this booklet John chicken introduces electric rules and know-how via examples instead of thought - permitting scholars to increase a valid knowing of the rules wanted through technicians in fields equivalent to electric engineering, electronics and telecommunications. No past heritage in engineering is believed, making this a great textual content for vocational classes at point 2 and three, starting place measure and introductory classes for undergraduates.

The booklet provides a logical subject development instead of following the constitution of a specific syllabus. despite the fact that, the insurance of this new version has been introduced absolutely based on and electronics devices of the 2007 BTEC nationwide specification. it's also designed to hide the necessities of the BTEC First specifications.

New fabric during this 3rd variation contains fresh chapters on semiconductor diodes and transistors in addition to extra sections on batteries, gas cells and replacement and renewable energies, relative and absolute voltages, self and mutual inductance, and digital try out and measuring instruments.

Support fabric for tutors is obtainable as a unfastened obtain through the trainer handbook part on http://textbooks.elsevier.com:

Instructor's handbook with complete suggestions and recommended marking scheme for all 7 revision assessments within the book

Solutions handbook with labored ideas for roughly four hundred of the additional difficulties within the book

Electronic records for all illustrations within the book

* New color structure is helping navigation and highlights key studying issues, formulae and exercises
* four hundred labored difficulties and over 1,300 questions, all with answers
* absolutely modern with the 2007 BTEC nationwide specification
* loose lecturer help fabric on hand through textbooks.elsevier.com

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Additional resources for Electrical and Electronic Principles and Technology (3rd Edition)

Example text

10 Alternatively, since I = 4 × 10−3 and R = 5 × 103 then from Ohm’s law, voltage V = IR = 4 × 10−3 × 5 × 103 = 20 V Electrical power and energy Hence, Electrical power power P = V × I = 20 × 4 × 10−3 Power P in an electrical circuit is given by the product of potential difference V and current I, as stated in Chapter 1. The unit of power is the watt, W. P = V × I watts Hence (1) From Ohm’s law, V = IR. Substituting for V in equation (1) gives: = 80 mW Problem 11. An electric kettle has a resistance of 30 .

Alternatively, from Ohm’s law, Energy = power × time, and power = voltage × current. 8 kJ Problem 16. Electrical equipment in an office takes a current of 13 A from a 240 V supply. 5p. 6 kWh V = IR = 10 × 20 = 200 V, hence power P = V × I = 200 × 10 = 2000 W = 2 kW). Energy used in 6 hours = power × time = 2 kW × 6 h = 12 kWh. 1 unit of electricity = 1 kWh; hence the number of units used is 12. 56p Problem 19. A business uses two 3 kW fires for an average of 20 hours each per week, and six 150 W lights for 30 hours each per week.

02 ] 2. f. 2 V. d. 7 V] 3. d. at the terminals of a battery is 16 V when no load is connected and 14 V when a load taking 8 A is connected. Determine the internal resistance of the battery. 25 ] 4. f. 2 supplies a load taking 10 A. d. at the battery terminals and the resistance of the load. 8 ] 5. 1 are connected in series to a load of 21 . d. at the battery terminals [(a) 1 A (b) 21 V] 6. For the circuits shown in Fig. 5 the resistors represent the internal resistance of the batteries. f. across PQ (ii) the total equivalent internal resistances of the batteries.

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