● Ọrụ ikpo ọkụ, nwere ike belata mgbu ikpere nke ọma, ikpere ikpere
● ịma jijiji, ịhịa aka n'ahụ nke ọma nke ikpere nwere ike ibelata ahụ ike akwara gburugburu ikpere
● Nrụgide ikuku
● Ọrụ ikpo ọkụ, nwere ike ibelata mgbu ikpere na oyi ikpere nke ọma
● ọkụ na-acha uhie uhie
● ọgwụgwọ magnetik
● Mgbasa ozi olu