How to Transmit 9 V / 12 V DC over Long Distance ?

How to Transmit 9 V / 12 V DC over Long Distance ?
 Hey Techies...    Today we are going to explore how to transmit 9 V / 12 V DC over a  long distance.    Consider we have a camera installed at one end in a farm which is located 500 meter away from the Power supply, since it is a farm...