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A cell of internal resistance 2 supplies curren... - JAMB Physics 2017 Question

A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the cell is
A
12.0%
B
25.0%
C
33.3%
D
75.0%
correct option: c
Internal resistance determine the maximum current that can be supplied

Efficiency = \(\frac{r}{R}\) × 100

= \(\frca{2}{6}\) × 100

= 33.3%
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