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Chapter 1 – Matrices And Determinants Multiple Questions and Answers.
| 21. | By changing the signs of all the elements of a matrix, we obtained | ||
| A. | identical matrix | ||
| B. | negative of a matrix | ||
| C. | null/zero matrix | ||
| D. | determinant of a matrix | ||
| 22. | A scalar matrix having each element equal to 1 is said to be | ||
| A. | unit or identical matrix | ||
| B. | rectangular matrix | ||
| C. | square matrix | ||
| D. | diagonal matrix | ||
| 23. | The order of matrix [2 3] is | ||
| A. | 2 - by - 1 | ||
| B. | 2 - by - 2 | ||
| C. | 1 - by - 2 | ||
| D. | 1 - by - 1 | ||
| 24. | If ‘a’ is a real number, then a−1; is said to be | ||
| A. | inverse of a | ||
| B. | identity of a | ||
| C. | transpose of a | ||
| D. | determinant of a | ||
| 25. | If all elements in a matrix are zeros, then it is called a | ||
| A. | column matrix | ||
| B. | diagonal matrix | ||
| C. | identical matrix | ||
| D. | null/zero matrix | ||
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