Chapter2 solutions - Problem 2.1 Find the current I and the power supplied by the source in the network shown I 6V 20 k Suggested Solution I= 6 = 0.3 mA

# Chapter2 solutions - Problem 2.1 Find the current I and the...

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Problem 2.1 Find the current Iand the power supplied by the source in the network shown. I 6 V 20 k Suggested Solution 3 6 0.3 mA 20 10 I = = × 3 (6)(0.3 10 ) 1.8 mW P VI = = × =
Problem 2.2 In the circuit shown, find the voltage across the current source and the power absorbed by the resistor. 3 mA3 k+VCS_
Problem 2.3 If the 10-resistor in the network shown absorbs 2.5 mW, find V . k S V S 10 k Suggested Solution 2 10 k S V P = or ( )( ) 3 3 2.5 10 10 10 5 V S R = × = × × = V P
Problem 2.4 In the network shown, the power absorbed by x R is 5 mW. Find x R . R x 1 mA 2 Suggested Solution ( ) 3 2 2 3 5 10 20 k 0.5 10 x P R I × = = = ×
Problem 2.5 In the network shown, the power absorbed by x R is 20 mW. Find x R . 2 mA R x Suggested Solution ( ) 3 2 2 3 20 10 5 k 2 10 P R I × = = = ×
Problem 2.6 A model for a standard two D-cell flashlight is shown. Find the power dissipated in the lamp. 1.5 V1.5 V1-lampSuggested Solution 1.51.53 VlampV=+=( )2239 W1lamplamplampVPR===
Problem 2.7 An automobile uses two halogen headlights connected as shown. Determine the power supplied by the battery if each headlight draws 3 A of current. 12 V Suggested Solution ( )( ) 12 3 3 72 W S P VI = = + =
Problem 2.8 Many years ago a string of Christmas tree lights was manufactured in the form shown in (a). Today the lights are manufactured as shown in (b). Is there a good reason for this change?
Problem 2.9 Find 1Iin the network shown. I 1 12 mA 4 mA 2 mA Suggested Solution I 1 12 mA 4 mA 2 mA I 2 2 0.004 0.002 0.006 A I = + = 1 2 0.012 I I = + 1 6 mA I =
Problem 2.10 Find 1 I and 2 I in the circuit shown. I 3 = 5 mA I S I 4 = 6 mA I 1 I 6 = 3 mA I 2 Suggested Solution By KCL, 1 4 6 mA I I = = Also, 6 2 4 I I I + = or 2 0.003 0.006 I + = 2 3 mA I =
Problem 2.11 Find x I and y I in the network shown. 4 mA 12 mA 8 mA I x I y Suggested Solution 0.012 0.004 x I = + 8 mA x I = 0.004 0.008 y I = + 4 mA y I = −
Problem 2.12 Find xI, yIand zIin the circuit shown. IxIyIz2 mA12 mA4 mA
Problem 2.13 Find xIin the circuit shown.
Problem 2.14 Find x I , y I and z I in the network shown. 12 mA 3 mA 2 mA 4 mA I x I y I z Suggested Solution 12 mA 3 mA 2 mA 4 mA I x I y I z 0.003 0.012 x I + = 9 mA x I = 0.012 0.002 0.004 y I + + = 10 mA y I = − 0.004 0.002 z I + = 2 mA z I = −
Problem 2.15 Find x I in the circuit shown. 2 I x I x 2 mA 6 mA Suggested Solution 2 I x I x 2 mA 6 mA 2 0.002 0.006 x x I I + = + 4 mA x I =