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11th Standard Maths English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Nine

11th Standard

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Maths

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. LetA= {-2, -1, 0, 1, 2} andf: A ⟶ Z be given by f(x) =x2-2x-3 then preimage of 5 is

    (a)

    -2

    (b)

    -1

    (c)

    0

    (d)

    1

  2. If a and b are the roots of the equation x2-kx+c = 0 then the distance between the points (a, 0) and (b, 0)

    (a)

    \(\sqrt { { 4k }^{ 2 }-c } \)

    (b)

    \(\sqrt { { k }^{ 2 }-4c } \)

    (c)

    \(\sqrt { 4c-{ k }^{ 2 } } \)

    (d)

    \(\sqrt { k-8c } \)

  3. Zero of the polynomial p(x) = x2 - 4x + 4

    (a)

    1

    (b)

    2

    (c)

    -2

    (d)

    -1

  4. In a triangle ABC, sin2A+sin2B+sin2C=2, then the triangle is

    (a)

    equilateral triangle

    (b)

    isosceles triangle

    (c)

    right triangle

    (d)

    scalene triangle

  5. There are 10 points in a plane and 4 of them are collinear. The number of straight lines joining any two points is

    (a)

    45

    (b)

    40

    (c)

    39

    (d)

    38

  6. Find the angle between the lines 3x2,- 10xy - 3y2 = 0

    (a)

    90°

    (b)

    45°

    (c)

    60°

    (d)

    30°

  7. The value \(\lambda\) for which the equation 12x2-10xy+2y2+11x-5y+\(\lambda\) =0 represent a pair of straight lines is

    (a)

    \(\lambda\)=1

    (b)

    \(\lambda\)=2

    (c)

    \(\lambda\)=3

    (d)

    \(\lambda\)=0

  8. |adj A| =_____________ where A is a square matrix of order

    (a)

    |A|

    (b)

    |A|2

    (c)

    |A|3

    (d)

    I

  9. The vector in the direction of the vector\(\hat{i}-2\hat{j}+2\hat{k}\) that has magnitude 9 is

    (a)

    \(\hat{i}-2\hat{j}+2\hat{k}\)

    (b)

    \(\frac { \hat { i } -2\hat { j } +2\hat { k } }{ 3 } \)

    (c)

    3(\(\hat{i}-2\hat{j}+2\hat{k}\))

    (d)

    9(\(\hat{i}-2\hat{j}+2\hat{k}\))

  10. Find the odd one out of the following

    (a)

    |x|

    (b)

    sin x

    (c)

    cos x

    (d)

    \(\frac{1}{x}\)

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