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.
Dental patients have many choices when it comes to dental crowns types; they can consist of ceramic, resin, porcelain, porcelain-fused-to-metal, all-metal materials, and more. The crown that is right for you will depend on your budget, medical needs, and cosmetic desires.