Solution Found!
Two identical batteries of emf # ! 12.0 V and internal
Chapter , Problem 40(choose chapter or problem)
Two identical batteries of emf # ! 12.0 V and internal resistance r 0.200 are to be connected to an external resistance R, either in parallel (Fig. 27-50) or in series (Fig. 27-51). If R ! 2.00r, what is the current i in the external resistance in the (a) parallel and (b) series arrangements? (c) For which arrangement is i greater? If R ! r/2.00, what is i in the external resistance in the (d) parallel arrangement and (e) series arrangement? (f) For whicharrangement is i greater now?+ + rRFigure 27-51 40
Questions & Answers
QUESTION:
Two identical batteries of emf # ! 12.0 V and internal resistance r 0.200 are to be connected to an external resistance R, either in parallel (Fig. 27-50) or in series (Fig. 27-51). If R ! 2.00r, what is the current i in the external resistance in the (a) parallel and (b) series arrangements? (c) For which arrangement is i greater? If R ! r/2.00, what is i in the external resistance in the (d) parallel arrangement and (e) series arrangement? (f) For whicharrangement is i greater now?+ + rRFigure 27-51 40
ANSWER:Problem 40
Two identical batteries of emf 
If R = r/200, what is i in the external resistance in the (d) parallel arrangement and (e) series arrangement? (f) For which arrangement is i greater now?
Step by Step Solution
Step 1 of 4
The emf is E=12 V.
The internal resistance is r=0.2 ?.
The external resistance is R=2r.
Part (a)
The expression for the equivalent resistance is parallel is:
The expression for the current in the external resistance in the parallel is:
