Physics
Physics
Problem
In a laboratory experiment, charges are transferred through a battery of potential difference 120 V. a. (i) Calculate the charge, in coulombs, that corresponds to electrons. b. (ii) Find the work done by the battery in moving this charge between its terminals. c. (iii) A further charge of is then moved through the same battery. Determine the total work done for both transfers.Intuitive explanation
The key idea here is understanding how a battery's potential difference relates to the energy it transfers to moving charges. Think of voltage as the "energy per charge" that the battery is willing to push through a circuit—120 V means each coulomb of charge gains 120 joules of energy. To solve problems about charge transfer, you'll connect this energy relationship () with whatever quantity the problem asks for (current, time, total energy, etc.).
Intuitive explanation
The key idea here is understanding how a battery's potential difference relates to the energy it transfers to moving charges. Think of voltage as the "energy per charge" that the battery is willing to push through a circuit—120 V means each coulomb of charge gains 120 joules of energy. To solve problems about charge transfer, you'll connect this energy relationship () with whatever quantity the problem asks for (current, time, total energy, etc.).