Electromagnetic Field Theory - Study Mode
[#226] As a result of reflections from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the
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(D) phase velocity
[#227] $${
abla ^2}H = {mu _0}{varepsilon _0}frac{{{partial ^2}overrightarrow H }}{{partial {t^2}}}$$ xa0 xa0is a
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(B) Wave equation
[#228] Consider the following statements: 1. For an isotropic medium, ε is a scalar constant. 2. For a homogeneous medium, ε, µ and σ are constant throughout the region. 3. In an anisotropic medium, D and E have the same direction. 4. For certain crystalline medium, ε varies with the direction of E. Which of the above crystalline medium, ε varies with the direction of E.
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(C) 1, 2 and 4
[#229] The magneto-motive force is
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(C) The sum of all currents embraced by one line of magnetic field
[#230] When the phase velocity of an electromagnetic wave depends on frequency in any medium, the phenomenon is called
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(D) dispersion