Why the tip of the nib of a pen is split?

Why is the tip of the nib of a pen split?

Why the nib of a pen is split?

The tip of the nib of a fountain pen is cut , so that

The tip of the nib of a fountain pen is cut , so that

Why is the tip of the nib of your writing pen split?

Why there is a split in the nib of a pen?

Why is the nib of a fountain pen splitted?

Cost of a dozen pens is ₹180 and cost of 8 ball pens is ₹56. Find the ratio of the cost of a pen to the cost of a ball pen.