s1 s2 examination date

Name of Examination	Last date of submitting application in the University office
	Without fine	With fine of Rs. 50/-	With Superfine of Rs. 250/-	Date of Commencement of Examination
Combined SI & SII (Regular 2008 Scheme & Supplementary 2003 scheme)	12.5.2009	14.5.2009	16.5.2009	29.5.2009

SCR and Triac

They are similar and function similar. The difference is that triacs are usually involved with the ac side and scr's with the dc side. Triac circuits can be used to control line-voltage (AC) powered devices.

The SCR (Silicon Control Rectifier), is a four-layer (PNPN) sandwich of semiconductor material
Fig. 1-a

equivalent circuit is shown in Fig. 1-b