Charge will build up on the terminals x and y and X is at lower potential than Y.
A voltage will be created if the magnetic flux through a coil is altered. The induced emf is the name given to this voltage.
There are two techniques to induce EMF:
In this case magnetic field B is increasing. That induces electromotive force and charge will build up on the terminals x and y and X is at lower potential than Y.
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