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NCERT Solutions Class 12 Physics Chapter 8 – Electromagnetic Waves
8.1
(b) The operational pace at which transformation happens within an electrical displacement zone over an extended period is referred to as displacement current. It’s a number that determines how changes in electric fields create magnetic fields based on Maxwell’s equations. The conduction power and the displacement current over the metal surfaces would be identical. As a result, 0.15 A might correspond to the displacement current I(d).
(c) Indeed, Kirchhoff’s first principle was to apply to every single capacitor panel as long as the total of the displacement & conduction voltages was equal. According to the junction principle of Kirchhoff’s law, which states I = Ic + Id, the total energy approaching an intersection matches the overall current exiting that juncture.
8.2
(b) Yes, the conduction current will be equal to the displacement current.
8.3
Ans – Under the state of vacuum, the overall wavelength has no bearing concerning the velocity of light (3 × 108 m/s). Also, it’s a vital element based on electromagnetic radiation where each one of them moves at an identical pace within a vacuum, irrespective of wavelength or operational frequency. Therefore, it remains precisely the same for every wavelength.
8.4
Ans – In a state of vacuum, the electromagnetic field is moving along the z-direction. The x-y vector will include the electric field (E) along with the magnetic field (H), both of which are supposed to be adjacent to one another.
8.5
8.6
Ans – The total frequency of the electromagnetic resonance of an oscillator is expected to be 109 Hz, which is the same as the rate of motion of a particle with charge oscillating regarding its mean location.
8.7
8.8
(b) Let’s assume that the waveform travels in a path toward positive x. This will result in the magnetic field gradient lying in the more favorable z-direction & the electric field unit in the favorable y-direction. The reason for this occurrence is due to each of the three vectors becomes perpendicular relative to the others.
8.9
8.10
Class 12 Physics Chapter-8 Electromagnetic Waves Overview
There are electromagnetic waves all around us, like radio waves, light waves, and X-rays. Chapter 8 talks about how electric and magnetic fields work together to create these waves and how they travel through space. Our Electromagnetic Waves NCERT Solutions can help you figure out how Maxwell’s equations, wave propagation, and the EM spectrum all work together.
A lot of students think this chapter is too abstract at first because it doesn’t include enough numbers. But concepts like displacement current, the wave equation derivation, and the spectrum can be hard to get. That’s why our solutions go over each legislation, explain you how they work in the real world, and use illustrations to help you understand them. This is why you learn ideas instead than just memorizing them.
The 2025 NCERT update took out things that weren’t needed and added new topics like polarization, how EM waves are used in the actual world, and questions that compare frequency and wavelength. Now, the attention is largely on figuring out how EM waves act in diverse media and problems that involve reasoning. Our Electromagnetic Waves NCERT Solutions are in pace with all of these changes, so you won’t miss any new ideas.
In brief, this chapter gives you the background you need to understand modern technologies like Wi-Fi, microwave ovens, and satellite phones. The NCERT Solutions for Electromagnetic Waves can help you build a strong base of knowledge for the boards or JEE. They have pictures, summaries, and answers to queries that explain both “how” and “why.”
FAQs – Electromagnetic Waves Class 12 Chapter-8 NCERT
It links the changing electric field with the magnetic field. We explain this through Maxwell’s equations in a simplified, visual way.
You’re not alone. Our solutions include mnemonics and tables to help you recall wavelengths, frequencies, and uses.
Mostly theory. However, our solutions show how to apply formulas in concept-based questions, especially those related to wave properties.
Because EM waves form the backbone of communication systems and modern electronics. Our solutions bridge theory with real applications.