Q69.The mirror image of the point (1, 2, 3), in a plane is (−73 , −43 , −13 ). Which of the following points lies on this plane? (1) (1, 1, 1) (2) (1, −1, 1) (3) (−1, −1, 1) (4) (−1, −1, −1)
What This Question Tests
The question requires finding the equation of a plane given a point and its mirror image, then checking which of the given options satisfies the plane's equation.
Concepts Tested
Formulas Used
Midpoint formula
Vector subtraction
Equation of a plane: A(x-x₀) + B(y-y₀) + C(z-z₀) = 0
📚 NCERT Sections This Tests
9.15 — Apply Mirror Equation And The Condition:
Physics Class 12 · Chapter 9
9.15 Apply mirror equation and the condition: (a) f < 0 (concave mirror); u < 0 (object on left) (b) f > 0; u < 0 (c) f > 0 (convex mirror) and u < 0 (d) f < 0 (concave mirror); f < u < 0 to deduce the desired result.
2.3 — Two Charges 2 Mc And –2 Mc Are Placed At Points A And B 6 Cm
Physics Class 11 · Chapter 2
2.3 Two charges 2 mC and –2 mC are placed at points A and B 6 cm apart. (a) Identify an equipotential surface of the system. (b) What is the direction of the electric field at every point on this surface?
1.18 — A Point Charge Of 2.0 Mc Is At The Centre Of A Cubic Gaussian
Physics Class 11 · Chapter 1
1.18 A point charge of 2.0 mC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
📋 Question Details
- Chapter
- 3D Geometry
- Topic
- Plane
- Year
- 2020
- Shift
- 08 Jan Shift 2
- Q Number
- Q69
- Type
- MCQ
- NCERT Ref
- Class 12 Mathematics Ch 11: Three Dimensional Geometry
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