the induced charge is constant for a fixed change of force

a force is exerted on a current-carrying conductor in a magnetic field

the magnitude of the induced e.m.f in a circuit is proportional to the rate of change of the number of lines of force linking the circuit

the induced current in a conductor is in such a direction as to oppose the change producing it

e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit