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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
    Average power input (in kW) is
    2. A.
    0.373
    B.
    0.137
    C.
    0.218
    D.
    0.500

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    Answer : Option C

    Explanation :

    -NA-

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