NCERT Class 12 Physics Solutions Electromagnetic Waves

Scroll down for PDF

NCERT Class 12 Physics Solutions Electromagnetic Waves- NCERT Solutions prepared for CBSE students by the best teachers in Delhi.

Class XII Chapter 8 – Electromagnetic Waves Physics

Question 8.1: Figure 8.6 shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15 A.

Question 8.2: A parallel plate capacitor (Fig. 8.7) made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s−1.

Question 8.3: What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?

Question 8.4: A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?

Question 8.5: A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?

Question 8.6: A charged particle oscillates about its mean equilibrium position with a frequency of 109 Hz. What is the frequency of the electromagnetic waves produced by the oscillator?

Question 8.7: The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the amplitude of the electric field part of the wave?

Question 8.8: Suppose that the electric field amplitude of an electromagnetic wave is E0 = 120 N/C and that its frequency is ν = 50.0 MHz. (a) Determine, B0, ω, k, and λ. (b) Find expressions for E and B.

Question 8.9: The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula E = hí (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?


Students should free download the NCERT solutions and get better marks in exams. Studiestoday.com panel of teachers recommend students to practice questions in NCERT books and download NCERT solutions.

Tags: 


Click on the text For more study material for Physics please click here - Physics

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Some last minute helpful tips and tricks for CBSE board exam

CBSE board exams are just around the corner. Students of CBSE class 10th and class 12th are preparing hard to appear in the CBSE board examination 2020, they are looking for last-minute tips and tricks to get good score in the board exam. However, during examination,...

CBSE class 12 Board examination pattern

This year the Central Board of Secondary Education (CBSE) made some important changes to the Class 12 exam pattern. Students should be aware of every minute detail of the modified exam pattern, from adding the internal exam in all subjects to changing the format of...

CBSE Exam centre locator Mobile App

The CBSE board examinations will start from 15 February 2020. The CBSE Board issued admit cards, and all schools start distributing copies of the admit cards. All students should read their admit card details correctly. CBSE admit card details the examination centre,...

CBSE chairman Anita karwal wrote a motivational letter to board candidates

CBSE chairman Anita karwal wrote a motivational letter to board candidates before the CBSE board Exam The CBSE (Central Board of Secondary Education) class 10th and 12th board exams are starting from 15 February 2020. Not only the students, their parents are also tense...

CBSE Counseling for Board exam 2020 starts today

The 23rd psychological Counseling starts 1st February (today) for The Class10 and Class12 CBSE students and their parents, by the Central Board of Secondary Education (CBSE).    This Counseling service is cost-free and this counseling service will be available every...

×
Studies Today