Consider the two circuits shown in the figure below in which the batteries are i

Question

Consider the two circuits shown in the figure below in which the batteries are identical. The resistance of each lightbulb is R. Neglect the internal resistance of the batteries.
(a) Find expressions for the currents in each lightbulb. (Use the following as necessary: script e for emf and R.)

IA =
IB =
IC =

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(b) How does the brightness of B compare with that of C? (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.)

Explain.

(c) How does the brightness of A compare with that of B and of C? (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.)

Explain.

Explanation / Answer

a) IA=e/R--->current in B and C are identical because of a series circuit therefore all R values are assumed to be 1---> 1R+1R=2R:--->IB=e/(2R)--->IC=e/(2R) b) B=C look at a c) A is 2 times B or C:A>B or C

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