Which of the following is wrong statement
An emf can be induced between the ends of a straight conductor by moving it through a uniform magnetic field
The self induced emf produced by changing current in a coil always tends to decrease the current
Inserting an iron core in a coil increases its coefficient of self induction
According to Lenz's law, the direction of the induced current is such that it opposes the flux change that causes it
ε=-Ldidt & L=μ0N2Al
If L increases then μr also increases
μmedium>μair