ISC | Class 12 | economics | Determination of equilibrium price & output under perfect competition

In this lecture on Producer’s Equilibrium under Perfect Competition (ISC Class 12 Economics 2026), we explain why a producer earns only normal profit in the long run, and how in the short run, the firm may earn normal profit, supernormal profit, or loss, depending on price and cost conditions. Using clear graphical explanations, we also show how the supply curve of a perfectly competitive firm is determined. 📈 This is a crucial concept for ISC Economics 2026 Board Exams, especially for diagram-based and reasoning questions. 💡 Key Topics Covered: Producer’s Equilibrium under Perfect Competition Why Producer Earns Only Normal Profit in the Long Run Short Run Situations: Normal Profit, Supernormal Profit & Loss TR–TC & MR–MC Explanation with Graphs Determination of Supply Curve under Perfect Competition #ISCClass12Economics #ProducersEquilibrium #PerfectCompetition #NormalProfit #SupernormalProfit #LossUnderShortRun #SupplyCurve #Economics2026 #BoardExamPreparation #MicroEconomics