Can earphone electric you in your ear?

In general, earphones do not give you an electric shock in the ear.

However, this can happen occasionally, at least with ear buds/"microbuds" if the audio source or earphones are faulty. The shock will not be anything dangerous, as long as you are using them properly, with the volume at a normal level. If you experience this, you probably should consider replacing the device At Fault. Usually, even if you get a shock, it will be mild and harmless (other than the sting)--this still indicates a problem which could potentially put you at greater risk in the future, however.

I have personally experienced this, because of a faulty audio source. It caused a brief sting, but nothing more.