Dear Vishal

No, students staying in hostel donot have to pay the electricity bill however if you opt for air conditioned rooms you will have to deposit a non refundable fee of rs - 5000 per semester as electricity bill.

You can also refer the official hostel guidelines provided by NSIT.

http://www.nsit.ac.in/static/documents/notices/Hostel_allotment_information.pdf

Hope yoy got my answer.

Cheers !