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NDA2013MathematicsThree Dimensional GeometryActual

What is the equation of the sphere with unit radius having centre at the origin?

Options

  1. Ax^2+y^2+z^2=0
  2. Bx^2+y^2+z^2=1
  3. Cx^2+y^2+z^2=2
  4. Dx^2+y^2+z^2=3

Correct answer

B. x^2+y^2+z^2=1

Step-by-step solution

The correct answer is option 'B'.

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