i just wanted to start learning to develop mobile applications.. is there a way to create an app using Visual Basic .Net ?
Checkout http://xamarin.com/. They use .NET technologies so you may be able to use VB. I know most of there stuff is in C# though. It's not free to release publicly but you can at least get a taste for it for free.
In the end, it's best to develop using the native technologies used by each platform. You're just closer to the intended system with fewer layers of abstraction. So for Android, that would be Java.
EDIT
Looks like VB.NET is only support in libraries not the main code which must be C# (https://developer.xamarin.com/guides/cross-platform/application_fundamentals/pcl/portable_visual_basic_net/).