1
GATE ECE 1996
MCQ (Single Correct Answer)
+2
-0.6
A uniform plane wave in air is normally incident on an infinitely thick slab. If the reflective index of the glass slab is 1.5, then the percentage of the incident power that is reflected from the air-glass interface is
A
0%
B
4%
C
20%
D
100%
2
GATE ECE 1996
MCQ (Single Correct Answer)
+2
-0.6
Some unknown material has a conductivity of $${10^{ 6}}$$ $$mho/m$$ and a permeability of $$4\pi \times {10^{ - 7}}\,\,\,\,\,H/m.$$ The skin depth for the material at $$1GHz$$ is
A
$$15.9\,\,\,\mu m$$
B
$$20.9\,\,\,\mu m$$
C
$$25.9\,\,\,\mu m$$
D
$$30.9\,\,\,\mu m$$
3
GATE ECE 1993
MCQ (More than One Correct Answer)
+2
-0
A plane wave is incident normally on a perfect conductor as shown in Fig. Here $$E_x^i,\,\,H_y^i$$ and $$\overrightarrow P {}^i$$ are electric field, magnetic field and Poynting vector respectively, for the incident wave. The reflected wave should have GATE ECE 1993 Electromagnetics - Uniform Plane Waves Question 52 English
A
$$E_x^r = - E_x^i$$
B
$$H_y^r = - H_y^i$$
C
$$\overrightarrow P {}^r = - \overrightarrow P {}^i$$
D
$$E_x^r = E_x^i$$
4
GATE ECE 1993
MCQ (Single Correct Answer)
+2
-0.6
A material is described by the following electrical parameters at a frequency of $$10$$ GHz is $$\sigma = {10^6}$$ mho/m, $$\mu = {\mu _0},$$ and $$ \in /{ \in _0} = 10.$$ The material at this frequency is considered to be $$\left( {{ \in _0} = {1 \over {36\,\,\pi }} \times {{10}^{ - 9}}\,\,F/m} \right)$$
A
a good conductor
B
a good dielectric
C
neither a good conductor nor a good dielectric
D
a good magnetic material
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