Dear Student,
A cell of emf 2.1 V and internal resistance 0.2 ohm is connected to a 4 ohm external resistance. The potential difference across the terminal of the cell is
A cell of terminal voltage 1.5V is connected to a resistor of 5 ohms, with an ammeter whose resistance 2.5W in series. What is the reading of the ammeter? Calculate the potential difference across 5 W resistor?