JEE Advanced · 2023 · 04 Jun 2023 · Paper 1 · Three Dimensional Geometry

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Let and be the lines and , respectively. Let X be the set of all the planes H that contain the line . For a plane H , let denote the smallest possible distance between the points of and H. Let be plane in X for which is the maximum value of as H varies over all planes in X.
Match each entry in List-I to the correct entries in List-II.

List-I
(P) The value of is
(Q) The distance of the point (0,1,2) from is
(R) The distance of origin from is
(S) The distance of origin from the point of intersection of planes and is

List-II
(1)
(2)
(3) 0
(4)
(5)

The correct option is :
  1. (A)
  2. (B)(P) → (5) (Q) → (4) (R) → (3) (S) → (1)✓ Correct
  3. (C)
  4. (D)

Answer: (B)

Solution

Line passes through origin with direction .

Line passes through with direction .

For maximum distance from to planes containing , the plane must be parallel to .

Plane containing has form with .

For parallel to : , giving .

So .

(P) Distance from point on to plane :

P → (5)

(Q) Distance from to :

Q → (4)

(R) Origin lies on plane , so distance = 0. R → (3)

(S) Intersection of , , and gives point .
Distance from origin: . S → (1)

Answer: (B)

JEE Advanced · 2023 · 04 Jun 2023 · Paper 1 · Single correct option

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