So I replaced my front brake pads yesterday and they seem to be scraping or dragging a tiny bit when the bike is rolling. Is this normal or Any ideas what I might have done wrong?

They may make noise until they get bedded in. For safety sake lift the front wheel and give it a spin to make sure that it is not dragging. If it's ok then ride it a bit and see if the noise goes away after a few good stops.

How will I know if it is indeed dragging ?

And how to I fix this problem ?

If you can lift the wheel and spin it, and it spins freely (doesn't slow down real fast), then it is not dragging. If it were dragging, the rotor would get very hot when riding, even if you don't use the brakes.

What they said. A little dragging noise is normal. Ride a mile or so at moderate speed and then use the engine/rear brake to stop. Spit on the front rotor. If it sizzles, you've got a stuck piston. If not, its fine.

Thanks guys it's fine. I also changed the oil and replaced the speedometer cable. What fun that was getting it screwed in the bottom of the speedometer.