A cell of emf and internal resistance is connected in series with an external resistor of
PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity
Problem
A cell of emf 1.5V and internal resistance 0.3Ω is connected in series with an external resistor of 2.7Ω.
Answer the following.
(i) Calculate the current in the circuit.
(ii) Determine the potential difference across the external resistor.
(iii) Find the power dissipated in (a) the external resistor and (b) inside the cell.
(iv) Compute the ratio of the power dissipated in the external circuit to that lost inside the cell.