Preparation for entrance exams like IITJEE, AIEEE, AIPMT, NEET, MP PET, WBJEE, CEE, MHTCET etc. can be aided by the online study material and video classes provided by http://www.exponenteducation.com. This video tutorial solves multiple choice question on magnetic effect of current.More such online classes are available at http://www.youtube.com/user/exponenteducation and http://www.crackiitjee.com/video-lectures/ for preparation of XI, XII, IIT JEE, AIEEE and other entrance exams.