which is free to move
Figure shows a poerful electromagnet arrangement. A copper ring, which is free to move, is placed on the projecting part of the core as shown. when the key is inserted , the ring
20
Oct
Figure shows a poerful electromagnet arrangement. A copper ring, which is free to move, is placed on the projecting part of the core as shown. when the key is inserted , the ring Figure shows a poerful electromagnet arrangement. A copper ring is placed on the projecting part of the core as shown. when the [...]