‘0' is a characteristic root of a matrix, if and only if, the matrix is

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ESE Electrical 2021 Official Paper
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  1. Idempotent matrix
  2. Periodic matrix
  3. Nilpotent matrix
  4. Singular matrix

Answer (Detailed Solution Below)

Option 4 : Singular matrix
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ST 1: UPSC ESE (IES) Civil - Building Materials
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Detailed Solution

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Singular Matrix:  A matrix is said to be singular if and only if its determinant is equal to zero.

Singular matrix example:

A = 

Singular Matrix Properties:

  • A matrix is said to be singular if and only if its determinant is equal to zero.
  • A singular matrix is a matrix that has no inverse such that it has no multiplicative inverse.
     

Application:

Characteristics equation of matrix can be written as,

|A - λI| = 0

If; λ = 0

|A| = 0

Hence, the matrix is singular matrix.

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