Q.

A demand curve will not shift:

A. When only income changes
B. When only prices of substitute products change
C. When there is a change in advertisement expenditure
D. When only price of the commodity changes
Answer» D. When only price of the commodity changes
Explanation: In economics, the demand curve is the graph depicting the relationship between the price of a certain commodity and the amount of it that consumers are willing and able to purchase at that given price. A change in price of the commodity leads to a movement along the demand curve without shifting it. In simple words, the increase of decrease in price of a commodity only causes contraction or extension of demand (increase causes contraction while decrease cause extension). Increase or decrease in demand only occurs only when there is achange in other determinants of demand, other than price of the commodity.
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