Law of Diminishing Marginal Utility
As a consumer consumes more units of a good, marginal utility derived from each successive unit decreases.
Grade 11th · Economics · Consumer Behaviour
Microeconomics: Consumer Equilibrium & Price Elasticity (Advanced Competitive & Board Prep)
Master Microeconomics: Consumer Equilibrium & Price Elasticity (Advanced Competitive & Board Prep) for Grade 11th Economics. Includes verified formulas, core concepts, step-by-step checklists, and interactive solver tools.
Commerce StreamFundamental Level
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Essential Formulas & Mathematical Definitions
MUx / Px = MUy / Py = MUm
Ed = (%ΔQ) / (%ΔP) = (ΔQ/ΔP) · (P/Q)
Total Expenditure Method
Indifference Curve & Budget Line
Indifference curve represents bundles yielding equal satisfaction (convex due to diminishing MRS). Consumer equilibrium occurs where Budget Line is tangent to highest IC (MRSxy = Px/Py).
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Exam Day Revision & Problem Solving Checklist
- ✓Identify degrees of elasticity: Ed = 0 (inelastic), Ed = 1 (unitary), Ed = ∞ (perfectly elastic)
- ✓Exceptions to law of demand: Giffen goods, Veblen luxury status goods
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High-Yield Exam Strategy & Scoring Tips
Step-by-Step Mark Allocation
Always state the governing principle or formula first, write given values with standard SI units, substitute clearly, and highlight the final numerical answer with units in a box for full step marking.
Common Calculation Traps
Watch for unit prefixes (cm to m, minutes to seconds, g to kg, degrees to radians). In coordinate and ray optics problems, double-check Cartesian sign conventions before computing.
Recommended Practice & Calculation Tools
Test your understanding and perform instant calculations with these free online utilities.
Percentage Calculator
Find percentages, percentage change, and what percent one number is of another.
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Frequently Asked Exam Questions & Concept Clarifications
Why do two indifference curves never intersect?
If they intersected, a single bundle would imply two distinct satisfaction levels simultaneously, violating transitivity.