1.

The below diagram shows electrostatic precipitator. Identify 1, 2 and 3.      

A. 1 - Discharge corona, 2 - Negatively charged wire, 3 - Collection plate grounded
B. 1 - Discharge corona, 2 - Positively charged wire, 3 - Collection plate grounded
C. 1 - Discharge corona, 2 - Negatively charged wire, 3 - Collection plate burnt
D. 1 - Uncharge corona, 2 - Positively charged wire, 3 - Collection plate never grounded
Answer» B. 1 - Discharge corona, 2 - Positively charged wire, 3 - Collection plate grounded


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