science

2. Rank the following in the order of how much of a corona discharge they would produce; from highest to least (e.g., if D is highest, then A, C, and B are lowest. entering DACB). Explain your response.

a. a large round metal ball hooked to a high voltage battery
b. a sharp metal needle connected by a wire to the ground (I. e. at zero voltage)
c. a large round metal ball hooked to a low voltage battery
d. a metal needle hooked to a high voltage battery

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