2.23 In the circuit shown in Fig. 2.87, determine v, and the power absorbed by the 12-2 resistor. 1Ω 1.2 2 4Ω 20 A ( 2Ω 8 Ω 12Ω 3Ω 6Ω w ww

do www LE Bo (d) Ao- Fig. 2.174 6. The four arms of a Wheatstone bridge have the following resistances in ohms. AB= 100, BC= 10, CD=5, DA = 60 (e) A galvanometer of 15 ohm resistance is connected across BD. Calculate the current through the galvanometer when a potential difference of 10 V is maintained across AC. [Elect. Engg. A.M.Ae. S.L.Dec. 1991] [4.88 mA]

H.W. 2.15: Obtain v and i in the circuit in Figure below. Solution:v = 3 V, i= 6 A 4 S 6 S ww ww- 9 A 1s 2S 3 S

2.4 (a) Calculate current i in the figure below when the switch is in position 1. (b) Find the current when the switch is in position 2. 2 100 £2 48 V 250 Ω