Multiple Choice Questions in Electronics and Electrical by T J DAVIES PDF

By T J DAVIES

ISBN-10: 0750616776

ISBN-13: 9780750616775

A different compendium of over 2000 a number of selection questions for college students of electronics and electric engineering. This booklet is designed for the next urban and Guilds classes: 2010, 2240, 2320, 2360. it will possibly even be used as a source for perform questions for any vocational course.

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Extra resources for Multiple Choice Questions in Electronics and Electrical Engineering

Example text

43° • ft 7 . 1 1 / 2 5 . 24/45° • ft 3 . 3 1 / 6 3 . 5 / 1 4 3 . 5 / - 1 4 3 . 83 / - 3 0 . 26 / 6 0 . 18 / 7 3 . 21 / 1 2 0 . 24 / l 5 3 . 41 / 3 5 . 32 7 - 6 1 . 07 7 - 8 1 . 08 / 6 2 . 33 / 4 6 . 68 / 6 0 . 54 / 2 6 . 5 / - 8 3 . 38 / 2 7 . 66 / - 1 8 . 08 / 6 6 . 32 / - 1 0 8 . 24 / 2 6 . 2° the • ft W h e n 2 + j 9 is divided b y 5 - j2 t h e a n s w e r is • a - 0 . 73 • d - 0 . 42 Phasors and transmitters T h e d i a g r a m s h o w s an ideal transformer. 50 T h e d i a g r a m s h o w s an ideal transformer with a resistive load.

1 1 ^Wb • • c 2 . 32 μ \ ^ ) A coil w o u n d o n a w o o d e n b o b b i_n 1 has a m a g n e t i c field strength of 2 5 0 0 A m . 57 the field strength is 2000 A m a n d the total flux 2 μ \ ¥ ο , the 2 is a p p r o x i m a t e l y cross-sectional area • • a 240 m m 2 b 796 m m 2 • • c 850 m m 2 d 900 m m A coil w o u n d on a plastic former h a s a total 2 flux of 2 0 \xNsfb and a cross-sectional area 7 p e r m1e a b i l i t y of of 4 5 0 0 m m . 94 m T A coil w o u n d uniformly on a n o n - m a g n e t i c 2 long.

7 A coil h a s 4 0 0 turns. 002 H. 5 A 0 . 9 A voltage of 12 V is i n d u c e d in a coil w h e n a flux of 150 m W b is reversed in 80 s. 4 s. 6 s. 5 A in 100 m s t h r o u g h a coil h a v i n g an i n d u c t a n c e of 5 H. 2 A coil has an i n d u c t a n c e of 12 H. 5 A is r e v e r s e d in a coil in 2 3 0 m s , a voltage of 1500 V is induced. 15 s and the i n d u c e d voltage is 6 kV, the value of the coil i n d u c t a n c e is • a 20 H • ft 3 0 H • c 40 H d 45 H A coil h a v i n g 1800 turns is w o u n d o n a nonm a g n e t i c former.

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Multiple Choice Questions in Electronics and Electrical Engineering by T J DAVIES


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