Question

How is the working of an electric bell affected, if alternating current be used instead of direct current?

ICSE Class 9 Physics Chapter Magnetism

Answer 1

If an A.C. source is used in place of a battery,electromagmet will be magnetised,but the polarityat its ends will change...but attractions of armature does not depend on the polarity of electromagne, so the bell will string on pressing the switch