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Chapter 15: Problem 2177

What oscillates in an electromagnetic wave? (A) \(\mathrm{E}^{-}\) and \(\mathrm{B}^{-}\) (B) \(\mathrm{B}^{-}\) (C) \(E^{-}\) (D) none of these

Short Answer

Expert verified
The correct answer is (A) \(\mathrm{E}^{-}\) and \(\mathrm{B}^{-}\), as both the electric (E) and magnetic (B) fields oscillate in an electromagnetic wave.

Step by step solution

01

Properties of Electromagnetic Waves

Electromagnetic waves are formed by the interaction of electric (E) and magnetic (B) fields that are perpendicular to each other and to the direction of wave propagation. These fields oscillate as the wave moves through space or a medium. For example, in a propagating wave with its electric field oscillating in the vertical direction, the magnetic field will oscillate in the horizontal direction. Step 2: Identifying oscillating components
02

Electric and Magnetic Field Oscillation

In an electromagnetic wave, both the electric (E) and magnetic (B) fields oscillate. As the electric field fluctuates, it creates a changing magnetic field, which in turn generates a changing electric field. This continuous interchange of energy between the electric and magnetic fields allows the electromagnetic wave to propagate. Based on this analysis, the correct answer is: (A) \(\mathrm{E}^{-}\) and \(\mathrm{B}^{-}\)

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Most popular questions from this chapter

A plane electromagnetic wave of wave intensity \(10 \mathrm{~cm}^{-2}\) strikes a small mirror of area \(20 \mathrm{~cm}^{2}\), held perpendicular to the approaching wave. The radiation force on the mirror will be (A) \(6.6 \times 10^{-11} \mathrm{~N}\) (B) \(1.33 \times 10^{-11} \mathrm{~N}\) (C) \(1.33 \times 10^{-10} \mathrm{~N}\) (D) \(6.6 \times 10^{-10} \mathrm{~N}\)

Astronomers have found that electromagnetic waves of wavelength $21 \mathrm{~cm}$ are continuously reaching the Earth's surface. Calculate the frequency of this radiation. $\left(\mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}\right)$ (A) \(14.28 \mathrm{GHz}\) (B) \(1.428 \mathrm{kHz}\) (C) \(1.428 \mathrm{MHz}\) (D) \(1.428 \mathrm{GHz}\)

The velocity of light in vacuum can be changed by changing (A) frequency (B) wavelength (C) amplitude (D) none of these

Which of the following electromagnetic waves has the highest frequency? (A) radiowaves (B) microwaves (C) \(\gamma\) rays (D) \(\mathrm{x}\) rays

Electromagnetic wave is produced by oscillating electric and magnetic fields \(E^{-}\) and \(B^{-}\). Choose only the incorrect statement from the following (A) \(\mathrm{E}^{-}\) is perpendicular to \(\mathrm{B}^{-}\). (B) \(E^{-}\) is perpendicular to the direction of propagation of the wave (C) \(\mathrm{B}^{-}\) is perpendicular to the direction of propagation of the wave (D) \(E^{-}\) is parallel to \(\mathrm{B}^{-}\)
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