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What is displacement current? - Physics

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प्रश्न

What is displacement current?

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उत्तर

The displacement current can be defined as the current which comes into play in the region in which the electric field and the electric flux are changing with time.

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अध्याय 5: Electromagnetic waves - Evaluation [पृष्ठ २८३]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 5 Electromagnetic waves
Evaluation | Q II. 1. | पृष्ठ २८३

संबंधित प्रश्न

Which em waves lie near the high frequency end of visible part of em spectrum? Give its one use. In what way this component of light has harmful effects on humans?


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Which of the following electromagnetic radiations is used for viewing objects through fog ______.


Consider an oscillator which has a charged particle oscillating about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is ______.


The electric and magnetic fields, associated with an electromagnetic wave, propagating along negative X-axis can be represented by ______.


Explain the importance of Maxwell’s correction.


Write down the properties of electromagnetic waves.


An EM wave of intensity I falls on a surface kept in vacuum and exerts radiation pressure p on it. Which of the following are true?

  1. Radiation pressure is `I/c` if the wave is totally absorbed.
  2. Radiation pressure is `I/c` if the wave is totally reflected.
  3. Radiation pressure is `(2I)/c` if the wave is totally reflected.
  4. Radiation pressure is in the range `I/c < p < (2I)/c` for real surfaces.

A 27 mW laser beam has a cross-sectional area of 10 mm2. The magnitude of the maximum electric field in this electromagnetic wave is given by:

[Given permittivity of space ∈0 = 9 × 10-12 SI units, Speed of light c = 3  108 m/s] 


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