# A Textbook of Electrical Technology in SI Units. Volume I: - download pdf or read online

By B. L. Theraja

ISBN-10: 8121902908

ISBN-13: 9788121902908

ISBN-10: 8121914736

ISBN-13: 9788121914734

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Read Online or Download A Textbook of Electrical Technology in SI Units. Volume I: Basic Electrical Engineering PDF

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Extra info for A Textbook of Electrical Technology in SI Units. Volume I: Basic Electrical Engineering

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79, the power dissipated in the 10 n resistor is 250 W. What is the total power dissipated in the circuit ? [850 W] 25 5 -+ E 5 + + [ E 10 10 Fig. 78 Fig. 77 6 2 12 8V Fig. 79 Fig. 80 [4 V] 23. What is the value of E in the circuit of Fig. 80? All resistances are in ohms. ao , . a- R 2 I R >R > 1 (a) b I b bO Ra a R I Rb I (b) (c) (d) Fig. 81 24. Find the equivalent resistance Ra_b at the tenninals a - b of the networks shown in Fig. 81. [(0) 0 (b) 0 (c) R (d) 2 n] 25. Find the equivalent resistance between tenninals a and b of the circuit shown in Fig.

Or -111 = -+-+R RIR2R3 Now R2~ . I, 1] = lR/RI I 1 0 V R23+ R R3]R ) GI- -Fig. (i) RIR2R3 R = From (I) above, /; lR = 11R, G, + R3RI ) = R]R2 + R2R3+ R3RI) 1 '(;, + G2 + G3 _1 G( - . 37. A resistance of 10 Q is connected in series with two resistances each of /5 Q arranged in parallel. 5 A with 20 V applied ? (Elements of Elect. -l; Banglore Univ. Jan. 1989) Solution. The circuit connections are shown in Fig. 46. 5x 10 = 15V Drop across parallel combination, VAB = 20 - 15 15 · I =5 V 15 10 B Hence,voltageacrosseachparallelresistanceis 5 V.

9. f. 10. Node is a junction in a circuit where two or more circuit elements are connected together. II. Branch is that part of a network which lies between two juncions. 12 Loop. It is a close path in a circuit in which no element or node is epcountered more than once. 13. Mesh. It is a loop that contains no other loop within it. For example, the circuit of Fig. 1 (a) has even branches, six nodes, three loops and two meshes whereas the circuit of Fig. 1 (b) has four branches, two nodes, six loops and three meshes.