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Consider the circle x^(2)+y^(2)-4x-2y+c=...

Consider the circle `x^(2)+y^(2)-4x-2y+c=0` whose centre is A(2, 1) If the point P (10, 7) is such that the line segment PA meets the circle in Q With PQ=5, then c=

A

`-15`

B

20

C

30

D

`-20`

Text Solution

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-CIRCLE-Exercise 1A(Circle)
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  3. Consider the circle x^(2)+y^(2)-4x-2y+c=0 whose centre is A(2, 1) If t...

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  6. Equation x^(2)+2ax-b^(2)=0 has real roots alpha,beta and equation x^(2...

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  7. If alpha, beta the roots of x^(2)+ax+b=0 and gamma,delta the roots of ...

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  8. The circle described on the line joining the points (0,1), (a,b) as di...

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  9. If the circles described on the line joining the points (0,1) and (alp...

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  10. If one end of the diameter of the circle x^(2)+y^(2)-6x+4y-12=0" is "(...

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  11. The point diametrically oppiosite to the point P (1,0) on the circle x...

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  12. The normal to the circle given by x^(2) + y^(2) - 6x + 8y - 144 = 0 at...

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  13. The centre and radius of the eircle with the segment of the line x+y=1...

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  14. If (x, 3) and (3, 5) are the ends of the diameter of a circle with cen...

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  15. The lines 2x-3y=5 and 3x-4y=7 are two diameters of a circle of area 15...

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  16. If the lines 3x-4y-7=0 and 2x-3y-5=0 are two diameters of a circle of ...

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  17. A variable circle passes through the fixed point A(p, q) and touches a...

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  18. If the Iines 2x+3y+1=0 and 3x-y-4=0 lie along diameters of a circle of...

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  19. The area of the circle (x+1)(x+2)+(y-1)(y+3)=0 is

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  20. The centre of the circle (x-2)(x-4)+(y-1)(y+3)=0 is

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