(a) (b) Two identical batteries of emf ? = 11.0 V and internal resistance r = 0.

Question

(a)

(b)

Two identical batteries of emf ? = 11.0 V and internal resistance r = 0.221 ? are to be connected to an external resistance R, either in parallel (see Figure (a)) or in series (see Figure (b)). If R = 0.364 ?, what is the current i (in A) in the external resistance in the (a) parallel and (b) in the series arrangements?

(b) Two identical batteries of emf ? = 11.0 V and internal resistance r = 0.221 ? are to be connected to an external resistance R, either in parallel (see Figure (a)) or in series (see Figure (b)). If R = 0.364 ?, what is the current i (in A) in the external resistance in the (a) parallel and (b) in the series arrangements? (a)

Explanation / Answer

a)i=E/R+r=18.8A b)i=2E/(2r+R)=27.29A

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