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Discussion :: GATE Production

  1. In an EDM process using RC relaxation circuit, a 12 mm diameter through hole is made in a steel plate of 50 mm thickness using a graphite tool and kerosene as dielectric. Assume discharge time to be negligible. Machining is carried out under the following conditions:
    Resistance                 40 Ω
    Capacitance              20 μF
    Supply voltage          220 V
    Discharge voltage    110 V
    The time for one cycle, in milliseconds, is
  2. A.
    0.55
    B.
    0.32
    C.
    0.89
    D.
    0.24

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    Answer : Option A

    Explanation :

    -NA-


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