B it’s the most logical answer
Technically, it should roll forever.
<span>First law of thermodynamics. This conservation law states that energy cannot be created or destroyed but can be changed from one form to another. In essence, energy is always conserved but can be converted from one form into another. Like when an engine burns fuel, it converts the energy stored in the fuel's chemical bonds into useful mechanical energy and then into heat, or more specifically, the melting ice cubes. Yeast breaks down maltose into glucose to produce alcohol and Co2 in the fermentation process. This is a prime example of the 1st law of thermodynamics. No form of usable energy is really lost; it only changes from one form to another</span>
To solve this problem we will apply the concepts related to magnetic flux and induced voltage. This last expression understood as the variation of the magnetic flux over time and, in turn, the magnetic flux expressed as the variation of the magnetic field in a certain area.
Magnetic flux through the circular coil is given as

The induced voltage is the change of the magnetic flux across the time, then

At the same time the magnetic flux through the square coil would be given as,

And the induced voltage EMF will be

Equating both expression we have



Therefore the emf induced in the square coil is 0.23355V
Beryl is shaped like the hexagonal crystal system