In both college and the NFL, the penalty is 15 yards.
15 yard penalty
In the NFL, the penalty is 15 yards. In college, the penalty is 10 yards.
In college football, the penalty is 15 yards. In the NFL, the penalty is 10 yards.
Many different reasons. Sometimes it's pass interference, offensive pass interference, roughing the kicker, roughing the passer, unnecessary roughness, horse callar tackle, encroachment, false start, illegal formation, intentional grounding, delay of game, tripping, block in the back, face mask, or holding. But there are many more.
10 yards from the spot of the foul
The penalty spot is 12 yards from the goal line.