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Explain the distinction between "change in quantity supplied" and "change in supply''' Use diagram.

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"Change in Quantity Supplied" means change in supply due to change in quantity price of the good.

Diagrammatically, it implies movement along the Supply Curve. When the producer moves from A to B, the rise in quantity of the good from OQ1 to OQ2 is on account of rise in price from OP1 to OP2.

(Answer based on downward movement is also correct)

"Change in Supply'' means change in supply due to change in any factor other than the own price of the good. 

Dagrimmatically, it means shift of supply curve when producer moves from A to B, the price remains unchanged at OP while the Supply Curve shift from S1 to S2. when the producer shift from S1 to S2  the supply fall OQ1 to OQ2.

(Answer based on shift to the right ii also correct)

Detailed Answer:

Basis Change in-Quantity SuppIied change in supply
Meaning When the quantity supplied changes due to change in price, keeping other factors constant, it leads to a movement along the supply curve, when the supply changes due to any change in the other  factors, at the same  price, it leads to a shift in supply curve.
Effect on supply curve  The movement is along the same suppiy curve either upward .(known as contraction in supply). The shift in the supply curve is either rightward (known as increase in supply) or leftward (known as decrease in supply).
Reason Tt occurs due to change (increase or decrease) in the price of the given commodity. It occurs due to a change in other factors like change in the price of inputs, change in taxes, change in technology etc.

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