# Air, with a Prandtl number of $0.7,$ flows over a flat plate at a high Reynolds number. Which of the following statement is TRUE? (A) Thermal boundary layer is thicker than the velocity boundary layer. (B) Thermal boundary layer is thinner than the velocity boundary layer. (C) Thermal boundary layer is as thick as the velocity boundary layer. (D) There is no relationship between the thicknesses of thermal and velocity boundary layers.

## Question ID - 155632 :- Air, with a Prandtl number of $0.7,$ flows over a flat plate at a high Reynolds number. Which of the following statement is TRUE? (A) Thermal boundary layer is thicker than the velocity boundary layer. (B) Thermal boundary layer is thinner than the velocity boundary layer. (C) Thermal boundary layer is as thick as the velocity boundary layer. (D) There is no relationship between the thicknesses of thermal and velocity boundary layers.

3537

(A) Thermal boundary layer is thicker than the velocity boundary layer.

Next Question :

Consider an eigenvalue problem given by $\mathbf{A x}=\lambda_{\mathrm{i}} \mathbf{x}$. If $\lambda_{\mathrm{i}}$ represent the eigenvalues of the nonsingular square matrix $\mathbf{A}$, then what will be the eigenvalues of matrix $\mathbf{A}^{2}$ ?
(A) $\lambda_{\mathrm{i}}^{4}$
(B) $\lambda_{\mathrm{i}}^{2}$
(C) $\lambda_{\mathrm{i}}^{1 / 2}$
(D) $\lambda_{\mathrm{i}}^{1 / 4}$ 