problem in using wifi in dell inspiron 3420 using ubuntu 12.10

hi all!
me new to this forum...can someone among u guyz assist me in using my internet via wifi in ubuntu 12.10 as i have recently bought dell inspiron 3420...the wifi works well using windos but when i login using ubuntu OS it prompts at its main screen network disconnected and hence im very worry...plz help
thnxs in advance

Type the following command to

Type the following command to list installed wireless card, enter:
$ lspci
$ lspci | grep -i wireless
$ lspci | egrep -i --color 'wifi|wlan|wireless'

Sample outputs:

0c:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300

Please note down the 0c:00.0.

What is shown? Copy and paste here?

Nan machines without wifi driver

machine you can not get wifi driver. recheck your view.