The GATE Grind

GATE 2022 PI – Question 17

Manufacturing Processes II · Advanced Manufacturing · 1 mark · Multiple choice

In electrical-discharge machining with discharge voltage V_b, spark energy is proportional to which expression?

  1. $V_b^{0.5}$
  2. $V_b$
  3. $V_b^2$
  4. $V_b^3$

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Correct answer: (C) $V_b^2$

Explanation

For the intended capacitor-discharge circuit with fixed capacitance, stored energy released per spark is $E=CV_b^2/2$. Thus energy is proportional to **V_b², C**.

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