Question # 1

Choose an answer

all

Choose an answer

Orthogonal

Involutary

Idempotent

Nilpotent

Cofactor of an element a_ijis defined by

Choose an answer

(-1)^i+j|A|

(-1)^i+jM_ij

(-1)^i+jM^-1

None of these

Choose an answer

6, -12, -18

-6, 4, 9

-6, -4, -9

-6, 12, 18

A diagonal matrix in which the diagonal elements are equal is called a

Choose an answer

Null matrix

Identity matrix

Scalar matrix

Row matrix

If A is a skew-symmetric matrix of order n and P, any square matrix of order n.prove that P' AP is

Choose an answer

Skew-symmetric

Symmetric

Null

Diagonal

A square matrix all of whose elements except the main diagonal are zeros is called a

Choose an answer

Null matrix

Singular matrix

Symmetric matrix

Diagonal matrix

If A and B are skew-symmetric then (AB)t is

Choose an answer

At Bt

AB

-AB

BA

Choose an answer

A²- 5A + 7I = 1

2A²- 3A + 7I = 0

A²- 5A + I = 0

A²- 5A + 7I = 0

Choose an answer

I

14 I

0

None of these

The order of the matrix [1 2 3] is

Choose an answer

1 x 1

3 x 3

3 x 1

1 x 3

The transpose of a row matrix is a ______

Choose an answer

Zero matrix

Diagonal matrix

Column matrix

Row matrix

Choose an answer

a = -1/2, b = -1

a = 1, b = 2

a = 2, b = 3

None of above

Choose an answer

x =0, y =4

x = -1, y = 2

x = 2, y = 3

x = 3, y = 4

Choose an answer

Identity matrix

Diagonal matrix

Null matrix

Hermitian matrix

Choose an answer

(ABC)' =

Choose an answer

CBA'

CBA

C'B'A

C'B'A'

If the trace of matrix A is 5, then the trace of the matrix 3A is

Choose an answer

3/5

5/3

8

15

The transpose of a zero matrix is a ______

Choose an answer

Column matrix

Zero matrix

Row matrix

Scalar matrix

Choose an answer

1

0

-1

2

For any positive integer n

Choose an answer

ABn = Bn A ⇔ AB = BA

ABn = Bn A⇔ A,B are square matrices and AB = BA

ABn = BnA⇔ A + B

ABn = BnA ⇔ A and B are square matries

If for the matrix A,A5 = 1,then A-1=

Choose an answer

A2

A3

A

None of above

Choose an answer

Symmetric

Skew-symmetric

Hermitian

Skew hermitian

Choose an answer

If A and B are two matrices such that AB = B and BA =A, then A²+ B²=

Choose an answer

2 AB

2 BA

A + B

AB

Choose an answer

2s²

2s³

s³

3s³

Choose an answer

0

1

-2

10

If for the matrix A, A⁵= I, then A^-1=

Choose an answer

A²

A³

A

None of above

Choose an answer

3 x 2

2 x 3

3 x 3

2 x 2

More Classes

Other Links

Mathematics ECAT Pre Engineering Chapter 5 Matrices and Determinants Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer