PRC-2 · Chapter 4 · Question 47 of 60
A square matrix where all diagonal elements are 1 and all other elements are 0 is called a/an:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) Identity Matrix (Unit Matrix)
Explanation
The identity matrix (I) acts like the number '1' in matrix multiplication; multiplying any matrix by I leaves it unchanged.
More Linear Programming MCQs
- Q49What is the condition for two matrices, A and B, to be conformable for *multiplication* (A × B)?
- Q50If the determinant of a square matrix A is exactly zero (|A| = 0), the matrix is formally called:
- Q51The process of swapping the rows and columns of a matrix A is called finding its:
- Q52What is the determinant of the 2x2 matrix: [[5, 2], [3, 4]]?
- Q53To find the inverse of a 2x2 matrix, you must divide the 'Adjoint' of the matrix by its: