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| Q. |
What is the radius of channel, when electrical breakdown occur? |
| A. | 4 µm |
| B. | 6 µm |
| C. | 8 µm |
| D. | 10 µm |
| Answer» D. 10 µm | |
| Explanation: in edm, the electrical breakdown occurs in dielectric in a channel of radius about 10 µm. | |
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