Class 9 Economics Chapter 9: The Price Puzzle – What Drives the Market Worksheet | NCERT Solutions, MCQs & Important Questions (CBSE 2026–27)
Economics (Chapter 9): The Price Puzzle – What Drives the Market
1. Demand:-Demand is the quantity of a product that consumers are willing and able to buy at a particular price.
Purchasing Power
- The ability of a consumer to buy goods and services.
- Demand requires both willingness and ability to pay.
- Law of Demand
- Price ↑ → Demand ↓
- Price ↓ → Demand ↑
There is an inverse relationship between price and quantity demanded.
2. Demand Schedule:- A table showing quantity demanded at different prices.
Demand Curve
- Graphical presentation of demand schedule.
- Downward sloping from left to right.
- Shows inverse relationship between price and demand.
3. Individual Demand:- Demand of one consumer at different prices. Example:
- ₹150 → 1 kg
- ₹100 → 2 kg
- ₹50 → 3 kg
4. Market Demand:- Market Demand = Sum of all individual demands
Formula:- Market Demand = Q₁ + Q₂ + Q₃ + ...
Market demand curve is flatter than an individual demand curve because it combines many consumers.
5. Other Determinants of Demand
(i) Price of Related Goods:- Goods whose demand affects each other.
(a) Substitute Goods:- Goods that can replace each other. Examples
- Tea & Coffee
- Mango & Banana
Rule:- Price of substitute ↑ → Demand for other good ↑
(b) Complementary Goods:- Goods used together. Examples
- Car & Petrol
- Mobile & Earphones
- Printer & Cartridge
Rule:-Demand for one ↑ → Demand for complementary good ↑
(ii) Income of Consumer
- Income ↑ → Demand generally ↑
- Higher income increases purchasing capacity.
(iii) Taste and Preference:- Consumer likes and dislikes influence demand.
Example:- A person who loves mangoes buys them even if oranges are cheaper.
(iv) Population:-Demand depends on:
- Population size
- Population composition
Examples
- More children → Sports shoes
- More adults → Formal shoes
- More elderly → Orthopaedic shoes
(v) Seasonality:- Demand changes according to:
- Weather
- Festivals
- School season
- Cultural habits
Examples
- Sweaters in winter
- Books at beginning of session
- Sweets during festivals
(vi) Future Price Expectations
- Expected price rise → Present demand increases.
- Expected price fall → Consumers postpone buying.
Example
- Waiting for Diwali discounts.
- Keyword: Diminishing Marginal Utility
As consumption increases,
Satisfaction from each extra unit decreases.
Therefore willingness to pay decreases.
6. Supply:- Supply is the quantity sellers are willing and able to sell at a particular price.
Law of Supply
- Price ↑ → Supply ↑
- Price ↓ → Supply ↓
There is a direct relationship between price and supply.
- Individual Supply
- Supply by one seller at different prices.
- Market Supply
- Market Supply = Sum of all individual supplies.
- Supply curve is upward sloping.
7. Other Determinants of Supply
(i) Price of Related Goods:- Producers shift production toward more profitable goods. Example
- Chickpea price ↑
- Wheat price ↓
- Farmer grows more chickpeas.
(ii) Number of Sellers
More sellers → Supply ↑
Fewer sellers → Supply ↓
(iii) Technology:- Better technology:
- Reduces production cost.
- Increases production.
- Increases supply.
Examples
- Drip irrigation
- Cold storage
(iv) Future Expectations:- If producers expect:
- Higher future prices → May increase production or hold stock.
- Lower future demand → Reduce production.
8. Market Equilibrium:- The point where:- Quantity Demanded = Quantity Supplied
There is:
- No shortage
- No surplus
- Stable market price
Example:-
- Equilibrium Price = ₹100
- Equilibrium Quantity = 12 kg
- Excess Demand
Demand > Supply:- Result:
- Shortage
- Prices rise
- Excess Supply
Supply > Demand:- Result:
- Surplus
- Prices fall
9. Dynamic Market:- Markets are constantly changing due to:
- Technology
- Weather
- Festivals
- Wars
- Pandemics
- Income changes
- Political events
Therefore, equilibrium keeps shifting. Example
- COVID-19 mask prices.
- Hotel Tariff Example
Hotel prices change because of:
- Tourist season
- Festivals
- Weather
- Booking trends
- Nearby hotel prices
- Room availability
- Revenue = Total income earned from selling goods or services before deducting expenses.
10. Role of Government:- Government intervenes because markets may not always be fair.
Main roles:
(i) Regulate Unfair Practices
- Protect:
- Consumers
- Workers
- Producers
Examples:
- Medicine price control
- Minimum wages
Price Ceiling:- An imposed price control that sets the maximum amount a seller can charge for a product for service.
Maximum legal price.
Purpose:- Prevent overcharging.
Price Floor:- An imposed limit on how low a price can be charged for a product, good, or service. for a price floor to be effective, it must be set above the market equilibrium price.
Minimum legal price. Purpose:- Protect producers/workers.
Must be above equilibrium price to be effective.
Monopoly:- A market with one seller controlling supply.
Effects:
- High prices
- Less supply
- Poor quality
- Less competition
Government regulates monopolies.
11. Regulators:- Examples:
- RBI
- TRAI
- SEBI
Central Consumer Protection Authority
Purpose:- Ensure transparency and fairness.
12. Public Goods:- Goods/services provided by government for everyone. Examples
- Roads
- Parks
- Bridges
- Streetlights
- Defence
- Drainage
Private firms usually avoid these because profits are low.
Hoarding:- Accumulating goods beyond immediate need, often expecting future shortages or price rise.
Black Marketing:- Illegal buying or selling of regulated or scarce goods.
Comodities Act:- The government intervented by declaring sanitisers essential commodities under the essential commodities Act. 1955, capping the maximum retail price at Rupees 100 for 200 ml bottles.
13. Limitations of Government Intervention
(i) Price Distortions:- Artificial price controls may reduce production.
(ii) Compliance Burdens:- Too many licences and regulations:
- Increase costs.
- Reduce ease of business.
Ease of Doing Business:- How easy it is to start, run and close a business.
(iii) Discourages Innovation:- Heavy regulations reduce:
- Investment
- Technology adoption
- Entrepreneurship
Comments
Post a Comment