Q
Critical Speed (Nc) of a ball mill is given by (where R1 and R2 are radii of ball mill and the ball respectively) ?
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A
A. Nc = (1/4π). √(g/r1 – r2)
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B
B. Nc = (1/2π). √(g/r1 – r2)
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C
C. Nc = (1/π). √(g/r1 – r2)
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D
D. Nc = (1/2π). √(r1 – r2/g)
Correct Answer:
B. B. Nc = (1/2π). √(g/r1 – r2)
