question: the diagram shows a resistor of resistance R connected to a cell of emf E and internal resistance r. which of the following correctly shows the potential difference V across the terminals of the cell?
Answer: V=ER/(R+r)
this question is from jan 2014 ial unit 2 physics paper q10.
PLEASE HELP ME UNDERSTAND THIS AND HOW THE ANSWER WAS DERIVED!
THANKSSS!! <333