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Which of the following is NOT true for electromagnetic waves? - Physics

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प्रश्न

Which of the following is NOT true for electromagnetic waves?

पर्याय

  • it transports energy

  • it transports momentum

  • it transports angular momentum

  • in vacuum, it travels with different speeds which depend on their frequency

MCQ

उत्तर

in vacuum, it travels with different speeds which depend on their frequency

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Electromagnetic waves - Evaluation [पृष्ठ २८३]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
पाठ 5 Electromagnetic waves
Evaluation | Q I. 14. | पृष्ठ २८३

संबंधित प्रश्‍न

Write any two important properties of electromagnetic waves.


Suppose that the electric field amplitude of an electromagnetic wave is E0 = 120 N/C and that its frequency is v = 50.0 MHz.

  1. Determine B0, ω, k, and λ.
  2. Find expressions for E and B.

How are electric vector `(vec "E")`, magnetic vector `(vec "B")` and velocity vector `(vec "C")` oriented in an electromagnetic wave?


How does oscillating charge produce electromagnetic waves?


Write the following radiations in ascending order with respect to their frequencies:

X-rays, microwaves, UV rays and radio waves.


A plane electromagnetic wave is passing through a region. Consider (a) electric field (b) magnetic field (c) electrical energy in a small volume and (d) magnetic energy in a small volume. Construct the pairs of the quantities that oscillate with equal frequencies.


An e.m. wave is propagating in a medium with a velocity `vec"v" = "v" hat"i"`. The instantaneous oscillating electric field of this e.m. wave is along +y-axis, then the direction of an oscillating magnetic field of the e.m. wave will be along:


Which of the following is an electromagnetic wave?


Write down the integral form of modified Ampere’s circuital law.


A plane EM wave travelling in vacuum along z direction is given by `E = E_0 sin(kz - ωt)hati` and `B = B_0 sin(kz - ωt)hatj` 

  1. Evaluate `oint E.dl` over the rectangular loop 1234 shown in figure.
  2. Evaluate `int B.ds` over the surface bounded by loop 1234.
  3. Use equation `oint E.dl = (-dphi_B)/(dt)` to prove `E_0/B_0` = c.
  4. By using similar process and the equation `ointB.dl = mu_0I + ε_0 (dphi_E)/(dt)`, prove that c = `1/sqrt(mu_0ε_0)`


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