The fee is a one-time fee for persons applying for F, J or M visas and covers the costs of administering SEVIS (the Student and Exchange Visitor Information System). This fee is charged in addition to the applicable visa application fee. The SEVIS fee has been set at $200 for most applicants.Certain short-term exchange visitors (au pairs, summer work/travel and camp counselors) will pay a reduced fee of $35. Persons sponsored by the U.S. Government are exempt from the fee.owever, persons with I-20/DS-2019 forms issued before that date are not subject to the SEVIS fee regardless of when they apply for their visa. Applicants with F-1, F-3, J-1, M-1 and M-3 visas) will have to pay the SEVIS fee.
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays.
Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when a relay contact is normally open (NO), there is an open contact when the relay is not energized. When a relay contact is Normally Closed (NC), there is a closed contact when the relay is not energized.