tag:blogger.com,1999:blog-5754734678634830817.post7839347184516922974..comments2011-06-07T21:47:21.974-07:00Comments on SPM Physics Form 5 - Electromagnetism: Uses of Electromagnet - Electromagnetic RelaySeknoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-5754734678634830817.post-37733271496419582682011-06-07T21:47:21.974-07:002011-06-07T21:47:21.974-07:00where can we use this?where can we use this?che_ek26http://www.blogger.com/profile/03303151119450373561noreply@blogger.com