Question

The equation of the circle with centre (0,2) and radius 2 is \[ x^2 + y^2 - my = 0. \] The value of \( m \) is:

• A. 1
• B. 2
• C. 4
• D. 3

Hint:

The equation of a circle is given by \( (x-h)^2 + (y-k)^2 = r^2 \), where \( (h,k) \) is the centre.

Answer 1

The Correct Option is C

Using the standard equation of a circle: \[ (x - 0)^2 + (y - 2)^2 = 2^2 \] Expanding and simplifying, we find \( m = 4 \).