Is there any problem in doing an internship in electrical department being an electronic student?

No, there is nothing like that. Almost, all the things that you need to know will be there.

NO worries u can do an internship.

No, there is no problem doing an internship from electrical branch even if you are an electronics student, however, you should confirm the same with the professors or authorities in your institute. I would suggest you stick to your own branch, as you would have superior knowledge within your subject