# Induced current in open circuit and closed circuit

In a closed circuit, electric current is induced so as to oppose the changing magnetic flux as per conservation of energy. However, in open circuit, emf is induced across its ends. How it is related to flux change?

• EMF is not defined in an open circuit. You always have to specify a path. If the circuit is open and you are interested in the fields, then you have to go beyond the induction term and calculate the entire solution of Maxwell's equations with the appropriate boundary conditions of the problem, which is usually much, much harder than an EMF problem. – CuriousOne Sep 10 '15 at 14:40