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Q.What is meant by Equilibrium Price ? How Equilibrium Price is determined under Perfect Competition ?

Punjab PsebPSEB Punjab Class 12 (Commerce) 2025Subjective· 6mImportance★★★★★
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Equilibrium price = where demand = supply; set by the intersection of market demand and supply curves under perfect competition.

Meaning: The equilibrium price is the price at which the quantity demanded of a good equals the quantity supplied, leaving neither excess demand (shortage) nor excess supply (surplus). The corresponding quantity is the equilibrium quantity.

Determination under perfect competition: In a perfectly competitive market, price is determined by the free interaction of total (market) demand and total (market) supply:

  • The demand curve slopes downward (law of demand) and the supply curve slopes upward (law of supply).
  • They intersect at one point, which fixes the equilibrium price (P) and equilibrium quantity (Q).**

Self-correcting mechanism:

  • If the price is above equilibrium, supply exceeds demand → a surplus → competition among sellers pulls the price down to P*. …

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