Question # 1

The transport of a null matrix is

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Row matrix

Column matrix

Square matrix

Null matrix

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

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Null matrix

Identity matrix

Scalar matrix

Row matrix

A = [3] is a/an

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Square matrix

Scalar matrix

Diagonal matrix

Identity matrix

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0

1

-A

-1

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all are correct

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Square matrix

Row matrix

Symmetric matrix

Null matrix

If there are m rows and n columns in a matrix then its order is

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m x n

m x m

n x n

n x m

(ABC)' =

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CBA'

CBA

C'B'A

C'B'A'

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1, 2, 3

1, 5, 9

2, 5, 8

3, 6, 9

Which of the following is skew symmetric matrix

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a = 4, b = 1

a = 1, b = -4

a = 0, b = 4

a = 2, b = 4

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1

0

3

-1

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An upper triangular matrix

A lower triangular matrix

A diagonal matrix

A null matrix

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0

Independent of a

Independent of b

Independent of c

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16

None of these

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Every identity matrix is

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Row-vector

Scalar

Column-vector

All

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

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3/5

5/3

8

15

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0

abc

1/abc

None of these

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Diagonal matrix

Scalar matrix

Triangular matrix

Identity matrix

Let A is a 3 x 3 matrix and B is its adjoint matrix. If |B| = 64, then |A| =

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The square matrix A is skew-symmetric when At=

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-B

-C

-A

-D

A square matrix A for which A^t= -A is called a

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Column matrix

Symmetric matrix

Skew-symmetric matrix

Row matrix

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In order of A is m x n and order of B is n x p then order of AB is

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m x m

n x n

m x p

p x m

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2s²

2s³

s³

3s³

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1

0

-1

2

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Two matrices A and B are conformable for the product AB if

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Both A and B are square

Both A and B are symmetric

Number of rows of A = number of columns of B

Number of columns of A = number of rows of B

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2 x 2

2 x 3

3 x 2

3 x 3

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ECAT Pre General Science Mathematics Chapter 5 Matrics and Determinants Online Test MCQs With Answers

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