The correct answer is option 1: increases.
When a magnet moves inside a coil, it induces an electric current in the coil. This phenomenon is known as electromagnetic induction. The magnitude of the electric current induced in the coil depends on the rate of change of magnetic flux, which is the product of the magnetic field strength and the area of the coil.
When the speed of the moving magnet inside the coil increases, it means that the magnetic field is changing more rapidly. This change in the magnetic field induces a larger electric current in the coil. Therefore, the electric current in the coil increases with the increase in speed of the magnet.
It`s important to note that the direction of the induced current depends on the direction of the change in the magnetic field. This is governed by Faraday`s law of electromagnetic induction. However, the question only asks about the effect of the speed on the magnitude of the current, not the direction.
In conclusion, if the speed of a moving magnet inside a coil increases, the electric current in the coil will also increase.