📚 Learning Guide
Demand and Supply Basics
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How does an increase in the price of a good affect producer surplus, according to the law of supply?

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Choose the Best Answer

A

Producer surplus increases as prices increase, allowing producers to earn more on each unit sold.

B

Producer surplus decreases because the quantity supplied decreases at higher prices.

C

Producer surplus remains unchanged regardless of price changes.

D

Producer surplus is irrelevant to the law of supply.

Understanding the Answer

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Answer

When the price of a good rises, producers can sell each unit for more than they paid to make it. The extra amount that each producer receives over the cost of producing that unit is added to their profit, which is called producer surplus. Because the price is higher, the whole area under the supply curve and above the cost curve but below the new price line expands, giving producers more surplus. For example, if a farmer sells tomatoes at $5 instead of $3, the two‑dollar gain on each tomato adds to the farmer’s total surplus. Thus, according to the law of supply, a price increase raises producer surplus.

Detailed Explanation

When the price of a good goes up, producers can sell each unit for more than the lowest price they would accept. Other options are incorrect because Some think a higher price makes producers supply less; It is not true that price changes do not affect surplus.

Key Concepts

law of supply
producer surplus
Topic

Demand and Supply Basics

Difficulty

medium level question

Cognitive Level

understand

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