What is law of returns explain it with the help of schedule and diagram?

returns to factor means change in physical output of a good or a commodity when the quantity demanded of one factor is increase while that of the other factors remain constant . It is a short run phenomenon and can be possible in three ways they area) Increasing return to factor - increasing returns to a factor refers to a situation on when each additional unit of a variable factor adds more and more to the total output that is when marginal product of a factor increases as more of the variable factor is constantb) constant returns to a factor - constant returns to a factor refers to a situation in which additional units of a variable factors adds the same amount of output that is when the marginal product of the variable factor is constantc) Diminishing returns to a factor refers to a situation in which each additional unit of a variable factor adds lesser and lesser amount of output that is when marginal product of a factor falls as more of it is used