[Spridgets] Relays

[WeslakeMonza1330 at aol.com]

A relay is used when you need to switch a larger current than the switch is  
designed for - eg high wattage headlamps.  As well as being designed to  cope 
with the larger current a relay is cheaper than a new switch.
 
Weslake-Monza 1330
 
In a message dated 14/02/2009 18:21:30 GMT Standard Time,  
khargreaves2 at gmail.com writes:

Are  relays used when you want two things to turn on together?  Ok,  stupid
question. . . but I am curious regarding the application or the  reason for
relays?