Explain Faraday's experiment using a magnet and a coil and state Faraday's laws of electromagnetism

A wire in the form of a tightly wound solenoid is connected to a DC source, and carries a current. If the coil is stretched so that there are gaps between successive elements of the spiral coil, will the current increase or decrease? Explain.

For the wire arrangement in the figure, $a=12.0 \mathrm{cm}$ and $b=16.0 \mathrm{cm}$.
The current in the long straight wire is $i=6.50t^2-10.0t$, where $i$ is in amperes and $t$ is in seconds. (a) Find the emf in the square loop at $t=3.00 \mathrm{s}$.
(b) What is the direction of the induced current in the loop?