Saturday, September 11, 2021

HSC Line And Plane All solved MCQ's: Maharashtra Board

Line And Plane

Q.1. The vector equation of line 2x-1=3y+2=z-2 is

(A) top enclose r equals open parentheses 1 half i with hat on top minus 2 over 3 j with hat on top plus 2 k with hat on top close parentheses plus lambda open parentheses 3 i with hat on top plus 2 j with hat on top plus 6 k with hat on top close parentheses

(B) top enclose r equals i with hat on top minus j with bar on top plus open parentheses 2 i with bar on top plus j with bar on top plus k with hat on top close parentheses

(C) r with bar on top equals open parentheses 1 half i with hat on top minus j with hat on top close parentheses plus lambda open parentheses i with hat on top minus 2 j with hat on top plus 6 k with hat on top close parentheses

(D) r with bar on top equals open parentheses space i with hat on top minus j with hat on top space close parentheses plus lambda open parentheses space i with hat on top minus 2 j with hat on top plus 6 k with hat on top space close parentheses


Q.2. The perpendicular distance of the plane 2x+3y-z=k from the origin is square root of 14 units, the value of k is 

(A) 14

(B) 196

(C) 2 square root of 14

(D) fraction numerator square root of 14 over denominator 2 end fraction


Q.3. The angle between the planes and top enclose r. open parentheses space i with hat on top minus 2 j with hat on top plus 3 k with hat on top close parentheses plus 4 equals 0 space a n d space top enclose r. open parentheses 2 i with hat on top plus j with hat on top minus 3 k with hat on top close parentheses plus 7 equals 0 is

(A) straight pi over 2

(B) straight pi over 3

(C) cos to the power of negative 1 end exponent open parentheses 3 over 4 close parentheses

(D) cos to the power of negative 1 end exponent space open parentheses 9 over 14 close parentheses


Q.4. The direction ratios of the line which is perpendicular to the two lines fraction numerator x minus 7 over denominator 2 end fraction equals fraction numerator y plus 17 over denominator negative 3 end fraction equals fraction numerator z minus 6 over denominator 1 end fraction space a n d space fraction numerator x plus 5 over denominator 1 end fraction equals fraction numerator y plus 3 over denominator 2 end fraction plus fraction numerator z minus 6 over denominator negative 2 end fraction

(A) 4, 5, 7

(B) 4, -5, 7

(C) 4, -5, -7

(D) -4, 5, 8


Q.5. The lines fraction numerator x minus 2 over denominator 1 end fraction equals fraction numerator y minus 3 over denominator 1 end fraction equals fraction numerator z minus 4 over denominator negative k end fraction space a n d space fraction numerator x minus 1 over denominator k end fraction equals fraction numerator y minus 4 over denominator 2 end fraction equals fraction numerator z minus 5 over denominator 1 end fraction are coplanar if

(A) k=1 or -1

(B) k=0 or -3

(C) k=plus-or-minus 3

(D) k=0 or -1


Q.6. The lines x over 1 equals y over 2 equals z over 3 space a n d space fraction numerator x minus 1 over denominator negative 2 end fraction equals fraction numerator y minus 2 over denominator negative 4 end fraction equals fraction numerator z minus 3 over denominator 6 end fraction and are

(A) perpendicular

(B) intersecting

(C) skew

(D) coincident


Q.7. The shortest distance between the lines fraction numerator x minus 3 over denominator 3 end fraction equals fraction numerator y minus 8 over denominator negative 1 end fraction equals fraction numerator z minus 3 over denominator 1 end fraction space a n d space fraction numerator x plus 3 over denominator negative 3 end fraction equals fraction numerator y plus 7 over denominator 2 end fraction equals fraction numerator z minus 6 over denominator 4 end fraction is

(A) 2 square root of 30

(B) 7 over 2 square root of 30

(C) 3 square root of 30

(D) 3


Q.8. If the point A open parentheses lambda comma space 5 comma space minus 2 close parentheses lies on the line fraction numerator x plus 1 over denominator 7 end fraction equals fraction numerator y plus 1 over denominator negative 6 end fraction equals fraction numerator z plus 1 over denominator 1 end fraction comma then the value of lambda is _______.

(A) -1

(B) 1

(C) 8

(D) -8


Q.9. The acute angle between the two planes x + y + 2z = 3 and 3x - 2y + 2z =7 is_______.

(A) sin to the power of negative 1 end exponent open parentheses fraction numerator 5 over denominator square root of 102 end fraction close parentheses

(B) cos to the power of negative 1 end exponent open parentheses fraction numerator 5 over denominator square root of 102 end fraction close parentheses

(C) sin to the power of negative 1 end exponent open parentheses fraction numerator 15 over denominator square root of 102 end fraction close parentheses

(D) cos to the power of negative 1 end exponent open parentheses fraction numerator 15 over denominator square root of 102 end fraction close parentheses


Q.10. The acute angle between the line fraction numerator x plus 1 over denominator 2 end fraction equals y over 3 equals fraction numerator z minus 3 over denominator 6 end fraction and the plane 10x + 2y - 11z = 8 is _______.

(A) sin to the power of negative 1 end exponent open parentheses 8 over 21 close parentheses

(B) cos to the power of negative 1 end exponent open parentheses 8 over 21 close parentheses

(C) sin to the power of negative 1 end exponent open parentheses 1 over 8 close parentheses

(D) cos to the power of negative 1 end exponent open parentheses 1 over 8 close parentheses


Q.11. If the line, fraction numerator x minus 1 over denominator 2 end fraction equals fraction numerator y plus 1 over denominator 3 end fraction equals fraction numerator z minus 2 over denominator 4 end fraction meets the plane, x + 2y + 3z = 15 at a point P, then the distance of P from the origin is

(A) fraction numerator square root of 5 over denominator 2 end fraction

(B) 7 over 2

(C) 2 square root of 5

(D) 9 over 2


Q.12. A plane passing through the points (0, -1, 0) and (0, 0, 1) and making an angle straight pi over 4 with the plane y - z + 5 = 0, also passes through the point:

(A) open parentheses square root of 2 comma negative 1 comma space 4 close parentheses

(B) open parentheses negative square root of 2 comma space 1 comma negative 4 close parentheses

(C) open parentheses negative square root of 2 comma negative 1 comma negative 4 close parentheses

(D) open parentheses square root of 2 comma space 1 comma space 4 close parentheses 


Q.13. The direction ratios of the line 3x+1=6y-2=1-z are

(A) 2, 1, 6

(B) 2, 1, -6

(C) 2, -1, -6

(D) -2, 1, 6


Q.14. The foot of perpendicular drawn from the point (0, 0, 0) to the plane is (4, -2, -5) then the equation of the plane is

(A) 4x + y + 5z = 14

(B) 4x - 2y - 5z = 45

(C) x - 2y - 5z = 10

(D) 4x + y + 6z = 11


Q.15. The length of the perpendicular from(1, 6, 3) to the line x over 1 equals fraction numerator y minus 1 over denominator 2 end fraction equals fraction numerator z minus 2 over denominator 3 end fraction

(A) 3

(B) square root of 11

(C) square root of 13

(D) 5


Q.16. If the line x over 3 equals y over 4 equals z is perpendicular to the line fraction numerator x minus 1 over denominator k end fraction equals fraction numerator y plus 2 over denominator 3 end fraction equals fraction numerator z minus 3 over denominator k minus 1 end fraction then the value of k is:

(A) 11 over 4

(B) negative 11 over 4

(C) 11 over 2

(D) 4 over 11


Q.17. The shortest distance between the lines top enclose r equals open parentheses space i with hat on top plus 2 j with hat on top plus k with hat on top close parentheses plus lambda open parentheses i with hat on top minus j with hat on top minus k with hat on top close parentheses space a n d space top enclose r equals open parentheses 2 i with hat on top minus j with hat on top minus k with hat on top close parentheses plus mu open parentheses 2 i with hat on top plus j with hat on top plus 2 k with hat on top close parentheses is

(A) fraction numerator 1 over denominator square root of 3 end fraction

(B) fraction numerator 1 over denominator square root of 2 end fraction

(C) fraction numerator 3 over denominator square root of 2 end fraction

(Dfraction numerator 5 over denominator square root of 26 end fraction


Q.18. Equation of X-axis is

(A) x=y=z

(B) y=z

(C) y=0, z=0

(D) x=0, y=0


Q.19. The equation of the plane passing through the points (1, -1,1), (3, 2, 4) and parallel to Y-axis is:

(A) 3x+2z-1=0

(B) 3x-2z=1

(C) 3x+2z+1=0

(D) 3x=2z=2


Q.20. The angle between the lines 2x=3y=-z and 6x=-y=-4z is

(A) 45 to the power of ring operator

(B) 30 to the power of ring operator

(C) 0 to the power of ring operator

(D90 to the power of ring operator


Q.21. The equation of the plane passing through (2, -1, 3) and making equal intercepts on the coordinate axis is

(A) x+y+z=1

(B) x+y+z=2

(C) x+y+z=3

(D) x+y+z=4


Q.22. the direction cosines of the normal to the plane 2x-y+2z=3 are

(A) 2 over 3 comma fraction numerator negative 1 over denominator 3 end fraction comma 2 over 3

(B) fraction numerator negative 2 over denominator 3 end fraction comma 1 third comma fraction numerator negative 2 over denominator 3 end fraction

(C) 2 over 3 comma 1 third comma 2 over 3

(D) 2 over 3 comma fraction numerator negative 1 over denominator 3 end fraction comma fraction numerator negative 2 over denominator 3 end fraction


Q.23. The equation of the plane in which the line fraction numerator x minus 5 over denominator 4 end fraction equals fraction numerator y minus 7 over denominator 4 end fraction equals fraction numerator z plus 3 over denominator negative 5 end fraction space a n d space fraction numerator x minus 8 over denominator 7 end fraction equals fraction numerator y minus 4 over denominator 1 end fraction equals fraction numerator z plus 5 over denominator 3 end fraction lie, is

(A) 17x - 47y - 24z + 172 = 0

(B) 17x + 47y - 24z + 172 = 0

(C) 17x + 47y + 24z + 172 = 0

(D) 17x - 47y + 24z + 172 = 0


Q.24. If the line fraction numerator x plus 1 over denominator 2 end fraction equals fraction numerator y minus m over denominator 3 end fraction equals fraction numerator z minus 4 over denominator 6 end fraction lies in the plane 3x - 14y + 6z +49 = 0, then the value of m is:

(A) 5

(B) 3

(C) 2

(D) -5


Q.25. If the planes top enclose r. open parentheses 2 i with hat on top minus lambda j with hat on top plus k with hat on top close parentheses equals 3 space a n d space top enclose r. open parentheses 4 i with hat on top minus j with hat on top plus mu k with hat on top close parentheses equals 5 are parallel , then the values of lambda space a n d space mu are respectively.

(A) 1 half comma negative 2

(B) negative 1 half comma 2

(C) negative 1 half comma negative 2

(D) 1 half comma 2


Q.26. Measure of angle between the planes 5x-2y+3z-7=0 and 15x-6y+9z+5=0 is

(A) 0 to the power of ring operator

(B) 30 to the power of ring operator

(C) 45 to the power of ring operator

(D) 90 to the power of ring operator


Q.27. If the lines given by top enclose r equals 2 i with hat on top plus lambda open parentheses i with hat on top plus 2 j with hat on top plus m k with hat on top close parentheses space a n d space top enclose r equals i with hat on top plus mu open parentheses 2 i with hat on top plus j with hat on top plus 6 k with hat on top close parentheses are perpendicular, then the value of m is

(A) 2 over 3

(B) fraction numerator negative 2 over denominator 3 end fraction

(C) fraction numerator negative 3 over denominator 2 end fraction

(D) 3 over 2

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