EMF and potential difference statements – Rankers Physics
Topic: Current Electricity
Subtopic: Combination of Batteries

EMF and potential difference statements

Consider the following statements and choose the correct option
Statement (A): Electromotive force (emf) is not a force, it is the voltage difference between two terminal of a battery in open circuit.
Statement (B): The potential difference across terminals of a battery having some internal resistance can never be greater than the emf of the battery.
 
Statement (A) is correct while statement (B) is incorrect
Statement (A) is incorrect while statement (B) is correct
Both the statements are correct
Both the statements are incorrect

Solution:

Statement (A) is correct as EMF is indeed a potential difference under open circuit. Statement (B) is incorrect because during charging, the terminal potential difference is \(V = E + Ir\), which is greater than the EMF \(E\).

Leave a Reply

Your email address will not be published. Required fields are marked *