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Question 390003
JEE Mathematics · Easy

Parabola: Focal chord MCQ

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Focal chordEasyQuestion 390003

Question

The latus rectum of y² = 4ax has length:
  1. A
    4a
    Correct
  2. B
    2a
  3. C
    a
  4. D
    8a

Correct answer

4a

Explanation

The latus rectum is the chord through the focus perpendicular to the axis. For y² = 4ax: at x = a, y² = 4a² → y = ±2a. Length = 4a.

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