Home › JEE Main › Mathematics › Matrices and Determinants › A scalar matrix becomes an identity matrix when …
A scalar matrix becomes an identity matrix when its diagonal entries equal:
AOne
BZero
CTwo
DTen
Answer & Solution
Correct answer: A. One
1. A scalar matrix has equal diagonal entries k.
2. For a particular k it matches the identity.
3. That value is k equals one.
_Source: NCERT Class 12 Mathematics Part I, Chapter 3, Matrices._
Related questions
The topic that classifies row, column and square matrices is about the:Symmetric and skew symmetric matrices are both required to be:Every diagonal element of a skew symmetric matrix is:A square matrix whose transpose equals its negative is called:A square matrix equal to its own transpose is called:The properties of transpose are stated in the text:The transpose of matrix A is denoted by A with a prime or by A raised to:Interchanging the rows and columns of a matrix gives its: