GATE ECE 2024 | GATE ECE Year Wise Previous Years Questions

GATE ECE 2024

MCQ (Single Correct Answer)

-1.33

A uniform plane wave with electric field $\vec{E}(x)=A_y \hat{a}_y e^{-j \frac{2 \pi x}{3}} \mathrm{~V} / \mathrm{m}$ is travelling in the air (relative permittivity, $\dot{o}_r=1$ and relative permeability, $\mu_r=1$ ) in the $+x$ direction ( $A_y$ is a positive constant, $\hat{a}_y$ is the unit vector along the $y$ axis). It is incident normally on an ideal electric conductor (conductivity, $\sigma=\infty$ ) at $x=0$. The position of the first null of the total magnetic field in the air (measured from $x=0$, in metres) is ________.

$\frac{3}{4}$

$\frac{3}{2}$

$-6$

$-3$

GATE ECE 2024

Numerical

-1.33

A lossless transmission line with characteristic impedance $Z_0 = 50 \Omega$ is terminated with an unknown load. The magnitude of the reflection coefficient is $|\Gamma| = 0.6$. As one moves towards the generator from the load, the maximum value of the input impedance magnitude looking towards the load (in $\Omega$) is _________.

Your input ____

GATE ECE 2024

MCQ (Single Correct Answer)

-0.33

For non-degenerately doped n-type silicon, which one of the following plots represents the temperature ($T$) dependence of free electron concentration ($n$)?

GATE ECE 2024 Electronic Devices and VLSI - Semiconductor Physics Question 3 English Option 1

GATE ECE 2024 Electronic Devices and VLSI - Semiconductor Physics Question 3 English Option 2

GATE ECE 2024

MCQ (More than One Correct Answer)

-0.33

The free electron concentration profile $n(x)$ in a doped semiconductor at equilibrium is shown in the figure, where the points A, B, and C mark three different positions. Which of the following statements is/are true?

GATE ECE 2024 Electronic Devices and VLSI - Semiconductor Physics Question 2 English

For $x$ between B and C, the electron diffusion current is directed from C to B.

For $x$ between B and A, the electron drift current is directed from B to A.

For $x$ between B and C, the electric field is directed from B to C.

For $x$ between B and A, the electric field is directed from A to B.

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