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What is the radius of channel, when electrical breakdown occur?(a) 4 µm(b) 6 µm(c) 8 µm(d) 10 µmI have been asked this question in an interview for job.My question is from EDM-Mechanism of Material Removal in portion Thermal Processes of Advanced Machining

Answer»

Correct answer is (d) 10 µm

The EXPLANATION: In EDM, the ELECTRICAL breakdown OCCURS in DIELECTRIC in a channel of radius about 10 µm.



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