Answer you can increase the strength of an electromagnet by:   1) Increasing the current flow   2) Increasing the number of coils   3) Passing an 'iron core' throu â¦ gh the coil of the electromagnet. + 63 others found this useful. FrmtheAngel Johnson.
Crowns can be made of a variety of different materials and new materials are continually being introduced. Some of the most popular options are listed below. Porcelain bonded to precious metal: this is what most crowns are made from. A precious metal base is made and then porcelain is applied in layers over it. Porcelain: these crowns are made entirely out of porcelain and are not as strong as bonded crowns.
All Porcelain or All Ceramic âThese dental crown materials offer the most natural look in your mouth, since they can be made to look just like real teeth. For those people who are allergic to metal, or who prefer not to have metal crowns, all porcelain or all ceramic crowns are an excellent option. However, there are differences in materials used.