A load resistance R is connected across a cell of emf E and internal resistance r. If the closed-circuit p.d. across the terminals of the cell is V, the internal resistance of the cell is
A. (E – V) R
B. (V – E)R
C. \(\frac{E-V}{V} R\)
D. \(\frac{E-V}{V}\)
Answer:C
A load resistance R is connected across a cell of emf E and internal resistance r. If the closed-circuit p.d. across the terminals of the cell is V, the internal resistance of the cell is
A. (E – V) R B. (V – E)R C. \(\frac{E-V}{V} R\) D. \(\frac{E-V}{V}\)