A) Elongation
B) Thickness
C) Both [a] and [b]
D) None of the above
Correct Answer: A
Solution :
In arc auxanometer actual growth in length of a plant is measured as actual growth =\[\frac{\text{distance}\,\text{travelled}\,\text{by}\,\text{pointer}\,\times \,\text{radius}\,\text{of}\,\text{pulley}}{\text{Length}\,\text{of}\,\text{pointer}\,\text{from}\,\text{centre}\,\text{of}\,\text{pulley}}\]
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