This paper represents the behavior of a physics based p-i-n perovskite solar cell by varying different parameters. Perovskite solar cells have gained more popularity in the recent few years due to different organic and inorganic materials. In this paper, a physics based theoretical model for perovskite solar cell is used for our simulation work. A p-i-n perovskite solar cell is considered for the work. By changing different parameters of solar cell, the open circuit voltage, short circuit current density and the efficiency vary. All the changes are plotted in the graphs. The J-V characteristics and the P-V curve for the p-i-n perovskite solar cell are shown in the paper. In this paper, the graph that are given have been generated using the accurate equations given for theoretical analysis. The changes are plotted separately for a better understanding. Maximum power has been calculated from the graph.