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If the line hx+ky=1 touches x^2+y^2=a^2 ...

If the line `hx+ky=1` touches `x^2+y^2=a^2` , then the locus of the point (h,k) is a circle of radius

A

a

B

`1/a`

C

`sqrta`

D

`1/sqrta`

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PATHFINDER-CIRCLE-QUESTION BANK
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  3. If the line hx+ky=1 touches x^2+y^2=a^2 , then the locus of the point ...

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  5. If the point (k+1,k) lies inside the region bound by the curve x=sqrt(...

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  6. The tangents drawn from the origin x^2+y^2+2gx+2fy+f^2=0 are perpendic...

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  7. Two circles with radii a and b touch each other externally such that t...

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  8. If (a,0) is a point on a diameter of the circle x^2+y^2=4, then x^2-4x...

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  9. If (alpha ,beta) is a point on the circle whose centre is on the x-axi...

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  10. Three concentrict circles of which the biggest is x^2+y^2=1 , have the...

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  11. A circle of constant radius 'r' passes through origin O and cuts the a...

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  12. For each natural number k, let Ck denotes the circle with radius k uni...

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  13. For each natural number k, let Ck denotes the circle with radius k uni...

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  14. P is a variable point on the line L = 0. Tangents are drawn to the cir...

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  15. P is a variable point on the line L = 0. Tangents are drawn to the cir...

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  16. Match List - I with List-II

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  17. Match List - I with List-II Let the functions defined in List - I ha...

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  18. If two circles (x-1)^2+(y-3)^2=r^2 and x^2+y^2-8x+2y+8=0 intersect in ...

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  19. Radius of a circle cuts the x-axis at two points at distance 4 units f...

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  20. Let PQ and RS be tangents at the extremities of one diameter PR of a c...

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