Class-12,Matrices

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Class-12,Matrices

Name of Student *

Contact No. *

Q1) The number of all possible matrices of order 3×3 with each entry 0 or 1 is *

1 point

512

none of these

Q2) If A is a matrix of order 3 × 4 , then each row of A has *

1 point

12 elements

7 elements.

3 elements

4 elements

Q3) If P is of order 2 × 3 and Q is of order 3 × 2, then PQ is of order *

1 point

3 × 2

2 × 3

2 × 2

3 × 3

Q4) The number of all the possible matrices of order 2 × 2 with each entry 0, 1 or 2 is *

1 point

none of these

Q5) If A and B are symmetric matrices of the same order, then *

1 point

AB – BA is a symmetric matrix

AB is symmetric matrix

A – B is a skew-symmetric matrix

AB + BA is a symmetric matrix

Q6) A square matrix A = [aij]nxn is called a diagonal matrix if aij = 0 for *

1 point

i<j

i>j

i = j

i ≠ j

Q7) If a square matrix A has two identical rows or columns, then det.A is : *

1 point

-1

none of these

Q8) If a matrix A is symmetric as well as skew symmetric, then A is a *

1 point

null matrix

none of these

diagonal matrix

unit matrix

Q9) *

1 point

none of these

an invertible matrix

a nilpotent matrix

an idempotent matrix

Q10) *

1 point

1×1

3×1

1×3

3×3

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