A square loop of side l is placed at a separation a with a very long wire AB, in same plane. If the current through BA is increasing in the direction shown, the induced current produced in the loop is

 

This scenario will also violate the principle of conservation of energy. If there is no current flowing, no force will also be required to oppose it and the whole situation just won't work as per the desire. There will be no control over the enrgy of the system.

You will be surprised to know that Lenz law is actually a result of the principle of conservation of energy. If there is no opposition to change in the magnetic flux, no external source of force will be required which will violate the principle of conservation of energy. Both these laws are interconnected to each other.

The magnitude of magnetic field due to circular coil of $N$  turns is given by

$B_C=\frac{{\mu }_{0}iN}{2R}$

$=\frac{4\pi \times 10^{-7}\times 7\times 100}{2\times 0.1}$

$=4.4\times 10^{-3} T$

$=4.4mT$

The direction of induced emf is to oppose changing flux.