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CBSE - XII Science - Physics - Electromagnetic Waves
please resolve with good explanation
Asked by kulhariabhijeet
21st April 2024,
2:39 PM
CBSE - XII Science - Physics - Electromagnetic Waves
which of the following does not travel in vaccum
Asked by writetoakashyadav
28th February 2024,
7:41 PM
CBSE - XII Science - Physics - Electromagnetic Waves
what is displacement current? why this concept was introduced?
Asked by munaxa013
19th January 2024,
1:21 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Please answer this. What is meant by the term 'displacement current'? Briefly explain how this current is different from a conduction current.
Asked by sagarmishra
6th March 2023,
4:07 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Why is the intensity of light is directly proportional to the square of amiplitude
Asked by vashu7985864937
23rd December 2021,
12:28 AM
CBSE - XII Science - Physics - Electromagnetic Waves
pls explain
Asked by mufeedatvp2000
19th April 2020,
4:20 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Why light can travel in vacuum where as sound can not do so
Asked by dumpapurush
22nd October 2018,
10:48 AM
CBSE - XII Science - Physics - Electromagnetic Waves
What is polarisation
Asked by ashwin.mts
1st October 2018,
5:27 PM
CBSE - XII Science - Physics - Electromagnetic Waves
how are frequency and intencity of electromagnetic wave related?
Asked by mbinukurian1971
25th July 2018,
12:29 AM
CBSE - XII Science - Physics - Electromagnetic Waves
Why a wave needs a medium to propagate? If so then why light does not need any medium? And why wave travel better in denser medium... and if so then why not light ?
Asked by m_tauqeer_
15th February 2018,
12:11 AM
CBSE - XII Science - Physics - Electromagnetic Waves
HOW 
IS PROVE.
PLEASE EXPLAIN IN DETAIL?
IS PROVE.
Asked by modi72879
12th October 2017,
8:29 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Plase prove the marked formula...
Logically it is not fitting to my mind that how that formula represents the path difference...
please can you show me the drivation for it...
Asked by nitishkrnehu09
9th October 2017,
7:35 PM
Asked by nitishkrnehu09
9th October 2017,
7:35 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Please explain me the the confusion about the marked step...
why a+bcoso=Rcos0(theta) at the same time bsin0(theta)= Rsin0(theta)
what is the logic for the cosideration...
Asked by nitishkrnehu09
9th October 2017,
7:26 PM
Asked by nitishkrnehu09
9th October 2017,
7:26 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Please Prove the fact that intensity is directly proportional to amplitude of the wave...
Asked by nitishkrnehu09
9th October 2017,
6:56 PM
CBSE - XII Science - Physics - Electromagnetic Waves
A capacitor made of 2 parallel Plate area A and separation D being Charged by Ac Show that the displacement current inside capacitor is same as the current charging the capacitor
Asked by Anshul
8th September 2017,
6:28 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Electromagnetic waves are transversal in nature? Please provide me the mathamatical derivation
with most simple method
Asked by Anshul
8th September 2017,
6:25 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Show that the average energy density of EMW is constant
Asked by rajuharan
12th March 2017,
7:43 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Find the intensity of EMW wave?
Asked by rajuharan
12th March 2017,
7:40 PM
CBSE - XII Science - Physics - Electromagnetic Waves
diffenrence between ultraviolet and infrared wave
did i say that they both are same because are light afterall soo why they are diffrent
Asked by saggugurupal
31st August 2016,
3:50 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Plz explain what experiment did sir Marconi did with Hertz experiment how he set up apparatus ?(plz explain this with diagram)and how did it worked??how were em waves generated and detected across English channel.
Asked by upmaniousagarika
30th July 2016,
5:56 PM
CBSE - XII Science - Physics - Electromagnetic Waves
What is the difference between transient current and displacement current?
Asked by joykphukan
23rd December 2015,
6:11 PM
CBSE - XII Science - Physics - Electromagnetic Waves
A plane electromagnetic wave, of angular frequency w is propagating with velocity c along the Z axis. Write the vector equations, of oscillating electric and magnetic fields and show these fields diagrammatically.
Asked by vinitapahel123
13th December 2015,
12:08 PM
CBSE - XII Science - Physics - Electromagnetic Waves
1. a capacitor has been charged by a DC source. what are the magnitudes of the conduction and displacement currents, when it is fully charged?
2. two wires of equal lenght, one copper and the other of manganin have same resistance. which is thicker?
Asked by ritu.nathawani
8th March 2015,
12:40 AM
CBSE - XII Science - Physics - Electromagnetic Waves
what is the frequency range of X-rays, gamma rays, UV rays, visible light, infrared rays, microwave and radio waves???
what is mass and charge of a deutron????
Asked by Karishma
4th March 2015,
8:18 PM
CBSE - XII Science - Physics - Electromagnetic Waves
15. Explain how one ‘observes an inconsistency’ when Ampere’s circuital law is applied to the process of charging a capacitor and how this ‘contradiction’ gets removed by introducing the concept of an ‘additional current’, known as the ‘displacement current’?
Asked by Malavika Umesh
26th February 2015,
10:24 AM
CBSE - XII Science - Physics - Electromagnetic Waves
Proove that EMW are transverse in nature and also find the energy density of EMW and poynting vector
Asked by Dr Amitava
15th October 2014,
7:37 PM
CBSE - XII Science - Physics - Electromagnetic Waves
what are the applications of various electromagnetic waves ???
Asked by Aashna Anith Kumar
20th August 2014,
9:42 AM
CBSE - XII Science - Physics - Electromagnetic Waves
A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the direction of electric and magnetic field vectors?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
The oscillating magnetic field in a plane electromagnetic wave is given by: (i) Calculate the wavelength of the electromagnetic wave. (ii) Write down the expression for the oscillating electric field.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Write any four characteristics of electromagnetic waves. Give two uses each of (i) radio-waves (ii) Micro-waves.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
(a) An em wave is travelling in a medium with a velocity . Draw a sketch showing the propagation of the em wave, indicating the direction of the oscillating electric and magnetic fields. (b) How are the magnitudes of the electric and magnetic fields related to the velocity of the em wave?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
What are the factors on which the velocity of light in vacuum depends?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
What travels faster than electromagnetic waves?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Calculate the time period of visible light for which the human eye is most sensitive.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Which scientist a. Predicted the presence of electromagnetic waves b. Experimentally demonstrated the existence of electromagnetic waves
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
What is an electromagnetic wave?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Electromagnetic Waves
When an ideal capacitor is charged by dc battery, no current flows. However, when an ac source is used, the current flows continuosly. How does one explain this, based on the concept of displacement current?
Asked by Topperlearning User
19th May 2014,
3:32 PM
CBSE - XII Science - Physics - Electromagnetic Waves
What is meant by the transverse nature of electromagnetic waves ? Draw a diagram showing the propagation of an electromagnetic wave along X-direction indicating clearly the directions of oscillating electric and magnetic fields associate with it.
Asked by Topperlearning User
19th May 2014,
2:41 PM
CBSE - XII Science - Physics - Electromagnetic Waves
What is the relation between the wavelength and frequency?
Asked by Topperlearning User
19th May 2014,
1:47 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Suppose a plane electromagnetic wave is travelling in x direction. What is a. The direction of the electric and magnetic field vectors b. The ratio of magnitudes
Asked by Topperlearning User
19th May 2014,
1:42 PM
CBSE - XII Science - Physics - Electromagnetic Waves
Explain the Hertz experiment to generate the electromagnetic wave.
Asked by Topperlearning User
19th May 2014,
1:38 PM
CBSE - XII Science - Physics - Electromagnetic Waves
State the properties of Electromagnetic Waves.
Asked by Topperlearning User
19th May 2014,
1:22 PM
