Fall SemeSter 2025 – eCS1501 eConomiCS ia |
november/DeCember PortFolio ComPlete
anSWerS | UPDateD 2025/2026 eDition | veriFieD
UniSa StUDy GUiDe | DUe 12 DeCember 2025 | 100%
aCCUrate anD exam-reaDy material For
UniverSity oF SoUth aFriCa StUDentS
Question 1:
What is the primary purpose of using the demand and supply model in economics?
A) To predict government policies
B) To analyze market equilibrium
C) To determine the cost of production
D) To evaluate financial statements
Correct Option: B) To analyze market equilibrium
Rationale: The demand and supply model is fundamental in economics as it helps
determine the price and quantity of goods in a market by analyzing the interaction
between consumers' demand for goods and the suppliers' willingness to sell them. It
illustrates how various factors affect market equilibrium.
Question 2:
If the price of coffee increases, what is the likely effect on the demand for tea, assuming
they are substitute goods?
A) Demand for tea will decrease
B) Demand for tea will remain unchanged
C) Demand for tea will increase
D) Demand for tea will fluctuate
Correct Option: C) Demand for tea will increase
Rationale: When the price of a substitute good (coffee) increases, consumers are likely
to shift their consumption to the alternative (tea), leading to an increase in the demand
for tea. This reflects the substitution effect in consumer behavior.
Question 3:
Which of the following factors would most likely shift the supply curve for a product to
the right?
A) An increase in production costs
B) A decrease in the number of suppliers
,C) Technological advancements in production
D) An increase in consumer income
Correct Option: C) Technological advancements in production
Rationale: Technological advancements typically lead to more efficient production
processes, reducing costs and allowing suppliers to produce more at any given price.
This results in a rightward shift of the supply curve.
Question 4:
Which of the following is a characteristic of a perfectly competitive market?
A) A few large firms dominate the market
B) Many buyers and sellers
C) Barriers to entry are high
D) Differentiated products
Correct Option: B) Many buyers and sellers
Rationale: A perfectly competitive market is characterized by many buyers and sellers,
where no single entity can influence the market price. This ensures that goods are sold
at equilibrium prices determined by market forces.
Question 5:
What happens to the equilibrium price and quantity when there is an increase in
demand, assuming supply remains unchanged?
A) Price decreases, quantity increases
B) Price remains unchanged, quantity increases
C) Price increases, quantity increases
D) Price increases, quantity decreases
Correct Option: C) Price increases, quantity increases
Rationale: When demand increases while supply remains constant, the increased
competition for the available goods drives up the price, and suppliers respond by
increasing the quantity supplied, resulting in a higher equilibrium quantity.
Question 6:
If a government imposes a price ceiling on rental properties, what is a likely
consequence?
A) An increase in the quality of rental properties
B) A shortage of rental properties
C) An increase in supply of rental properties
D) An equilibrium in the rental market
,Correct Option: B) A shortage of rental properties
Rationale: A price ceiling sets a maximum price that is below the market equilibrium,
leading to a situation where the quantity demanded exceeds the quantity supplied,
resulting in a shortage.
Question 7:
In the context of elasticity, what does a price elasticity of demand greater than 1
indicate?
A) Demand is inelastic
B) Demand is unitary elastic
C) Demand is elastic
D) Demand is perfectly elastic
Correct Option: C) Demand is elastic
Rationale: A price elasticity of demand greater than 1 indicates that the quantity
demanded changes by a larger percentage than the change in price, meaning
consumers are responsive to price changes.
Question 8:
Which of the following is an example of a negative externality?
A) A public park
B) Education funding
C) Pollution from a factory
D) A new highway
Correct Option: C) Pollution from a factory
Rationale: A negative externality occurs when the actions of one party impose costs on
others who are not involved in the economic transaction, such as pollution affecting
nearby residents and the environment.
Question 9:
What is the primary focus of macroeconomics?
A) Individual firm behavior
B) Overall economy performance
C) Consumer choices
D) Market structures
Correct Option: B) Overall economy performance
, Rationale: Macroeconomics studies the behavior and performance of an economy as a
whole, including factors like GDP, unemployment rates, and inflation, rather than
individual markets or firms.
Question 10:
When a firm experiences diminishing marginal returns, what does this imply?
A) Total output will increase indefinitely
B) The firm should reduce its output
C) Each additional unit of input contributes less to output
D) The firm is maximizing its profits
Correct Option: C) Each additional unit of input contributes less to output
Rationale: Diminishing marginal returns occur when adding an additional factor of
production results in a smaller increase in output, indicating that the efficiency of
inputs is declining.
Question 11:
What is the effect of a subsidy on a good?
A) Decreases supply
B) Increases supply
C) Decreases demand
D) Increases the price
Correct Option: B) Increases supply
Rationale: A subsidy reduces production costs for suppliers, encouraging them to
produce more of the good, which results in an increase in supply in the market.
Question 12:
Which statement best describes a monopoly?
A) Many firms compete in the market
B) Firms produce differentiated products
C) There are no barriers to entry
D) A single firm dominates the market
Correct Option: D) A single firm dominates the market
Rationale: In a monopoly, a single firm is the sole provider of a good or service, allowing
it to control prices and output levels due to a lack of competition and high barriers to
entry for other firms.
november/DeCember PortFolio ComPlete
anSWerS | UPDateD 2025/2026 eDition | veriFieD
UniSa StUDy GUiDe | DUe 12 DeCember 2025 | 100%
aCCUrate anD exam-reaDy material For
UniverSity oF SoUth aFriCa StUDentS
Question 1:
What is the primary purpose of using the demand and supply model in economics?
A) To predict government policies
B) To analyze market equilibrium
C) To determine the cost of production
D) To evaluate financial statements
Correct Option: B) To analyze market equilibrium
Rationale: The demand and supply model is fundamental in economics as it helps
determine the price and quantity of goods in a market by analyzing the interaction
between consumers' demand for goods and the suppliers' willingness to sell them. It
illustrates how various factors affect market equilibrium.
Question 2:
If the price of coffee increases, what is the likely effect on the demand for tea, assuming
they are substitute goods?
A) Demand for tea will decrease
B) Demand for tea will remain unchanged
C) Demand for tea will increase
D) Demand for tea will fluctuate
Correct Option: C) Demand for tea will increase
Rationale: When the price of a substitute good (coffee) increases, consumers are likely
to shift their consumption to the alternative (tea), leading to an increase in the demand
for tea. This reflects the substitution effect in consumer behavior.
Question 3:
Which of the following factors would most likely shift the supply curve for a product to
the right?
A) An increase in production costs
B) A decrease in the number of suppliers
,C) Technological advancements in production
D) An increase in consumer income
Correct Option: C) Technological advancements in production
Rationale: Technological advancements typically lead to more efficient production
processes, reducing costs and allowing suppliers to produce more at any given price.
This results in a rightward shift of the supply curve.
Question 4:
Which of the following is a characteristic of a perfectly competitive market?
A) A few large firms dominate the market
B) Many buyers and sellers
C) Barriers to entry are high
D) Differentiated products
Correct Option: B) Many buyers and sellers
Rationale: A perfectly competitive market is characterized by many buyers and sellers,
where no single entity can influence the market price. This ensures that goods are sold
at equilibrium prices determined by market forces.
Question 5:
What happens to the equilibrium price and quantity when there is an increase in
demand, assuming supply remains unchanged?
A) Price decreases, quantity increases
B) Price remains unchanged, quantity increases
C) Price increases, quantity increases
D) Price increases, quantity decreases
Correct Option: C) Price increases, quantity increases
Rationale: When demand increases while supply remains constant, the increased
competition for the available goods drives up the price, and suppliers respond by
increasing the quantity supplied, resulting in a higher equilibrium quantity.
Question 6:
If a government imposes a price ceiling on rental properties, what is a likely
consequence?
A) An increase in the quality of rental properties
B) A shortage of rental properties
C) An increase in supply of rental properties
D) An equilibrium in the rental market
,Correct Option: B) A shortage of rental properties
Rationale: A price ceiling sets a maximum price that is below the market equilibrium,
leading to a situation where the quantity demanded exceeds the quantity supplied,
resulting in a shortage.
Question 7:
In the context of elasticity, what does a price elasticity of demand greater than 1
indicate?
A) Demand is inelastic
B) Demand is unitary elastic
C) Demand is elastic
D) Demand is perfectly elastic
Correct Option: C) Demand is elastic
Rationale: A price elasticity of demand greater than 1 indicates that the quantity
demanded changes by a larger percentage than the change in price, meaning
consumers are responsive to price changes.
Question 8:
Which of the following is an example of a negative externality?
A) A public park
B) Education funding
C) Pollution from a factory
D) A new highway
Correct Option: C) Pollution from a factory
Rationale: A negative externality occurs when the actions of one party impose costs on
others who are not involved in the economic transaction, such as pollution affecting
nearby residents and the environment.
Question 9:
What is the primary focus of macroeconomics?
A) Individual firm behavior
B) Overall economy performance
C) Consumer choices
D) Market structures
Correct Option: B) Overall economy performance
, Rationale: Macroeconomics studies the behavior and performance of an economy as a
whole, including factors like GDP, unemployment rates, and inflation, rather than
individual markets or firms.
Question 10:
When a firm experiences diminishing marginal returns, what does this imply?
A) Total output will increase indefinitely
B) The firm should reduce its output
C) Each additional unit of input contributes less to output
D) The firm is maximizing its profits
Correct Option: C) Each additional unit of input contributes less to output
Rationale: Diminishing marginal returns occur when adding an additional factor of
production results in a smaller increase in output, indicating that the efficiency of
inputs is declining.
Question 11:
What is the effect of a subsidy on a good?
A) Decreases supply
B) Increases supply
C) Decreases demand
D) Increases the price
Correct Option: B) Increases supply
Rationale: A subsidy reduces production costs for suppliers, encouraging them to
produce more of the good, which results in an increase in supply in the market.
Question 12:
Which statement best describes a monopoly?
A) Many firms compete in the market
B) Firms produce differentiated products
C) There are no barriers to entry
D) A single firm dominates the market
Correct Option: D) A single firm dominates the market
Rationale: In a monopoly, a single firm is the sole provider of a good or service, allowing
it to control prices and output levels due to a lack of competition and high barriers to
entry for other firms.
