Bihar Board - Class 12 Physics - Chapter 8: Electromagnetic Waves Notes
"Electromagnetic Waves Chapter 12 is an important chapter in Grade 12 Physics. Understanding the concepts explained in this chapter can help students achieve good results in their materials. Therefore, it is essential to practice the NCERT notes for Grade 12 Physics Chapter 8 Electromagnetic Waves. In this article, we have provided download links for solutions to Chapter 8, which include microwave, visible, infrared, X-ray, and gamma-ray solutions.
Vidyakul provides a set of over 400 practice questions related to Chapter 8 for students. Students should focus on solving all the questions in the material provided by Vidyakul to score well.
Points to Remember:
Students can find important points to remember from Class 12 Physics Chapter 8. Noting down important points helps students in quick revision during the preparation for the final exam.
- Maxwell found a discrepancy in Ampere's law and suggested the existence of an additional current, which is called displacement current.
- An alternating electric field generates electromagnetic waves. An alternating electric field oscillates harmonically with a frequency Vv; it generates electromagnetic waves of the same frequency v.
- In 1887, Hertz produced and detected electromagnetic waves with a wavelength of a few meters in the laboratory. Thus, he verified Maxwell's equations' fundamental prediction.
- Electric and magnetic fields oscillate sinusoidally in an electromagnetic wave in space and time. Oscillatory electric and magnetic fields, E and B, are perpendicular to each other and perpendicular to the direction of propagation of electromagnetic waves.
- The spectrum of electromagnetic waves, in principle, extends to an infinite range of wavelengths. Different regions are known by different names.
- Infrared waves are also known as heat waves.
Subjects and Subtopics:
First, reading the NCERT notes on electromagnetic waves can be challenging for students. However, daily practice and understanding the concepts will make the learning process easier. Students should focus on solving as many questions as possible to excel in the subject and achieve maximum scores in exams.
All problems and solutions provided by Vidyakul are based on the latest curriculum. Students can practice all solutions for free and can score high in exams.
Some Important Questions:
Question 1: Using the formula E = hν, obtain the energy of photons in eV units for various parts of the electromagnetic spectrum (energy for radiation is: photon).
Answer: The energy of photons in eV units for various parts of the electromagnetic spectrum can be obtained using the formula E = hν, where E represents energy and ν represents frequency (ν = c/λ, where c is the speed of light and λ is the wavelength).
Question 2: What can you say about the electric and magnetic fields in a plane electromagnetic wave that travels in free space in the z-direction and has a wavelength of 50 MHz?
Answer: In a plane electromagnetic wave that travels in free space in the z-direction and has a wavelength of 50 MHz, the electric and magnetic fields are oscillating perpendicularly to each other and to the direction of wave propagation.
Question 3: A radio can tune any station in the 8.3 MHz to 15 MHz band. What is the bandwidth of the relevant wavelength band?
Answer: The bandwidth of the relevant wavelength band is the difference between the highest and lowest frequencies in the band. In this case, it is 15 MHz - 8.3 MHz = 6.7 MHz."
If you have any more questions or need further translations, feel free to ask!
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