D) If the battery has an internal resistance of 4.00 ? , what current will the a

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D) If the battery has an internal resistance of 4.00 ? , what current will the array draw if the battery is connected across bc?

Chrome File Edit View History Bookmarks People Window Help MasteringPhysics: Chapter 26 Homework https://session.masteringphysics.com/myct/itemView?assignmentProblemID=59016798 MPABRAHAM25242016S Signed in as Tanner Calloway Help Close Chapter 26 HomeworkExercise 26.5 Resources s 1 of 8 next» Exercise 26.5 Part A A triangular array of resistors is shown in the figure (Figure 1). What current will this array draw from a 30.0 V battery having negligible internal resistance if we connect it across (a) ab, (b) bc, (c) ac? Submit My Answers Give Up Figure 1 of 1 Part B Submit My Answers Give Up Part C 20.0 4170

Explanation / Answer

current drawn through battery I = V/Requivalent

case a) when battery is connected across ab

Requivalent = 15*30/15+30 = 10 ohm

hence current from battery I = 30/10 = 3 ampere

b) across bc

Requivalent =10*35/45 = 7.77 ohm

current I = 30/7.77 = 3.857 ampere

c) across ac

Requivalent =20*25/45 = 11.11 ohm

current = 30/11.11 = 2.7002 ampere

D) if battery has internal resistance of 4 ohm and battery is connected across bc

Requivalent = 7.77+4 = 11.77 ohms

current I = 30/11.77 = 2.54 amperes

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