When Howard Head retired from a fantastic career creating the first aluminum laminated ski, and also successfully created a tennis company as well (Head Ski and Head Tennis), he attempted to learn tennis from a local tennis pro.
Howard quickly learned for sure that he had no real athletic talent for tennis and would need all the help he could get. This is when he created the large-head tennis racquets.
Howard knew that if the head was extra large, but the same weight as a normal racquet, he could obtain much more stability against movement. Now his pro could set up his stroke and Howard could carry out the stroke without the racquet moving off course.
This is based on the formula: inertia = mass x distance x distance. In this case, the distance of the head rim from the central axis, or twist point, could determine how stable the head of the racquet remained (I used the same theory to help my wife develop stable strokes, but don't tell her).
With all that being said, it can be pretty clear that a beginner tennis player can benefit greatly from using a large-head racquet. It can be lightweight and still be stable. Now strokes can be more easily learned without having the racquet constantly veering off course.
Still another advantage for the beginner is that a large-head racquet can create much more power than a smaller-head racquet simply because the longer strings are much more efficient at returning the ball efficiently, hopefully in the proper direction.
A beginner can also benefit from a graphite tennis racket, especially if it's a large head, simply because it is lightweight and very powerful. Cheaper aluminum racquets were decidedly heavier and more difficult to wield.
Personally, I think that the larger the racquet head, the better it is for a beginner. I would look for a racquet with a headsize of at least 110 square inches, ranging all the way up to 135 square inches, which is the largest legal headsize.
Now all the beginner needs is a teacher who can show him the proper racquet stroke preparation and follow-through.
P.S. I am assuming that the proper handle size has been found for each person. This can be easily found during the shopping at the pro shop.
Stay tuned for tips on racquet selection for intermediate and advanced players...