:. Write the expressions for equivalent emf and equivalent internal
resistance of two cells having different emfs and different internal
resistances connected in series.
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Explanation:
Answer. Consider the circuit given below. The cell can be modified with an emf ε and the internal resistor with resistance r which is connected in series. ... So, V = ε – Ir, where V is the potential difference across the circuit, ε is the emf, I is the current flowing through the circuit, r is internal resistance.
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