Assertion: EM wave are transwers in nature.
Reason: The electric and magnetic fields of an e.m. wave are perpendicular to each other also perpendicular to the direction of wave propagation.
Assertion: EM wave are transwers in nature.
Reason: The electric and magnetic fields of an e.m. wave are perpendicular to each other also perpendicular to the direction of wave propagation.
Reason: The electric and magnetic fields of an e.m. wave are perpendicular to each other also perpendicular to the direction of wave propagation.
A
Statement-1 is true, statement-2, is true, statement-2 is a correct explanation for statement -1
B
statement -1 is true, statement -2 is true, statement -2 is NOT a correct explanation for statement -1
C
statement-1 is true , statement-2 is false
D
statement-1 is false, statement-2 is true
Text Solution
Verified by Experts
The correct Answer is:
A
`lamda=(c//v)=1.5xx10^(-2)m`
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Read the following passage and then answer questions (a) to (e) on the basis of your under- standing of the passage and the related studied concepts. In accordance with Faraday.s law of electromagnetic induction a magnetic field, changing with time, gives rise to an electric field. Again as per Ampere-Maxwell.s law an electric field, changing with time, gives rise to a magnetic field. It means that if we consider a charge oscillating with some frequency, it produces an oscillating electric field in space, which produces an oscillating mag- netic field, which in turn, is a source of oscillating electric field and so on. The oscillating electric and magnetic fields thus regenerate each other and an electromagnetic wave propagates through space. The energy associated with the propagating wave comes at the expense of the energy of the oscillating charge. Electromagnetic wave propagates through free space as a transverse wave in which vecE and vecB are perpendicular to each other as well as perpendicular to the direction of wave propagation. Like other waves electromagnetic waves carry energy and momentum. As electromagnetic waves contains both electric and magnetic fields, it has an electrical energy density mu_(E)=(1)/(2)in_(0)E^(2) as well as a magnetic energy density mu_(B)=(B^(2))/(2mu_(0)). Both of these vary with time. In which direction does the electric field oscillates?
Read the following passage and then answer questions (a) to (e) on the basis of your under- standing of the passage and the related studied concepts. In accordance with Faraday.s law of electromagnetic induction a magnetic field, changing with time, gives rise to an electric field. Again as per Ampere-Maxwell.s law an electric field, changing with time, gives rise to a magnetic field. It means that if we consider a charge oscillating with some frequency, it produces an oscillating electric field in space, which produces an oscillating mag- netic field, which in turn, is a source of oscillating electric field and so on. The oscillating electric and magnetic fields thus regenerate each other and an electromagnetic wave propagates through space. The energy associated with the propagating wave comes at the expense of the energy of the oscillating charge. Electromagnetic wave propagates through free space as a transverse wave in which vecE and vecB are perpendicular to each other as well as perpendicular to the direction of wave propagation. Like other waves electromagnetic waves carry energy and momentum. As electromagnetic waves contains both electric and magnetic fields, it has an electrical energy density mu_(E)=(1)/(2)in_(0)E^(2) as well as a magnetic energy density mu_(B)=(B^(2))/(2mu_(0)). Both of these vary with time. What is the frequency and wavelength of the electromagnetic wave?
Knowledge Check
Assertion : Electromagnetic waves are transverse in nature Reason : The electric and magnetic fields in electromagnetic waves are perpendicular to each other and to the direction of propagation.
Assertion : Electromagnetic waves are transverse in nature Reason : The electric and magnetic fields in electromagnetic waves are perpendicular to each other and to the direction of propagation.
A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true but reason is not the correct explanation of assertion
C
If assertion is true but reason is false
D
If both assertion and reason are false
Assertion In electromagnetic wave, if direction of veriations of electric and magnetic field are perpendicular to each other and also perpendicular to the direction of wave propagation. Reason Electronegative waves are transverse in nature.
Assertion In electromagnetic wave, if direction of veriations of electric and magnetic field are perpendicular to each other and also perpendicular to the direction of wave propagation. Reason Electronegative waves are transverse in nature.
A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
C
If Assertion is true but Reason is false.
D
If Assertion is false but Reason is true.
When a capacitor of capacitance C after charging with a charge Q is connected to inductor of self inductance L, the oscillation of charge takes place with time between the two plates of capacitor. If one plate of capacitor is connected to antenna and other plate is earthed, then em wave are produced, which are sinusoidal variation of electric and magnetic field vectors, perpendicular to each other as well as perpendicular to the direction of propagation of wave. The velocity of these waves depends upon the electric and magnetic properties of the medium. the em wave were produced experimentally by Hertz in 1888 using Hertz Oscillator, which were of wavelength 6m. Jagdish chander bose in 1895 produced these waves which were of wave length 5mm to 25mm and in 1896, G. Marconi established a wireless communication between two stations 50km apart using em waves. In an em wave, the amplitude of electric field is 10Vm^-1 . The frequency of wave is 5xx10^(14)Hz . the wave is propagating along z-axis. Sun also sends em wave to earth. which one of em wave out of the visible portion, from sun will be reaching the surface of earth earlier than others:
When a capacitor of capacitance C after charging with a charge Q is connected to inductor of self inductance L, the oscillation of charge takes place with time between the two plates of capacitor. If one plate of capacitor is connected to antenna and other plate is earthed, then em wave are produced, which are sinusoidal variation of electric and magnetic field vectors, perpendicular to each other as well as perpendicular to the direction of propagation of wave. The velocity of these waves depends upon the electric and magnetic properties of the medium. the em wave were produced experimentally by Hertz in 1888 using Hertz Oscillator, which were of wavelength 6m. Jagdish chander bose in 1895 produced these waves which were of wave length 5mm to 25mm and in 1896, G. Marconi established a wireless communication between two stations 50km apart using em waves. In an em wave, the amplitude of electric field is 10Vm^-1 . The frequency of wave is 5xx10^(14)Hz . the wave is propagating along z-axis. Sun also sends em wave to earth. which one of em wave out of the visible portion, from sun will be reaching the surface of earth earlier than others:
A
violet waves
B
green waves
C
yellow waves
D
red waves
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Read the following passage and then answer questions (a) to (e) on the basis of your under- standing of the passage and the related studied concepts. In accordance with Faraday.s law of electromagnetic induction a magnetic field, changing with time, gives rise to an electric field. Again as per Ampere-Maxwell.s law an electric field, changing with time, gives rise to a magnetic field. It means that if we consider a charge oscillating with some frequency, it produces an oscillating electric field in space, which produces an oscillating mag- netic field, which in turn, is a source of oscillating electric field and so on. The oscillating electric and magnetic fields thus regenerate each other and an electromagnetic wave propagates through space. The energy associated with the propagating wave comes at the expense of the energy of the oscillating charge. Electromagnetic wave propagates through free space as a transverse wave in which vecE and vecB are perpendicular to each other as well as perpendicular to the direction of wave propagation. Like other waves electromagnetic waves carry energy and momentum. As electromagnetic waves contains both electric and magnetic fields, it has an electrical energy density mu_(E)=(1)/(2)in_(0)E^(2) as well as a magnetic energy density mu_(B)=(B^(2))/(2mu_(0)). Both of these vary with time. What is the amplitude of electric field vector?
When a capacitor of capacitance C after charging with a charge Q is connected to inductor of self inductance L, the oscillation of charge takes place with time between the two plates of capacitor. If one plate of capacitor is connected to antenna and other plate is earthed, then em wave are produced, which are sinusoidal variation of electric and magnetic field vectors, perpendicular to each other as well as perpendicular to the direction of propagation of wave. The velocity of these waves depends upon the electric and magnetic properties of the medium. the em wave were produced experimentally by Hertz in 1888 using Hertz Oscillator, which were of wavelength 6m. Jagdish chander bose in 1895 produced these waves which were of wave length 5mm to 25mm and in 1896, G. Marconi established a wireless communication between two stations 50km apart using em waves. In an em wave, the amplitude of electric field is 10Vm^-1 . The frequency of wave is 5xx10^(14)Hz . the wave is propagating along z-axis. In em wave, the average energy density due to magnetic field is
When a capacitor of capacitance C after charging with a charge Q is connected to inductor of self inductance L, the oscillation of charge takes place with time between the two plates of capacitor. If one plate of capacitor is connected to antenna and other plate is earthed, then em wave are produced, which are sinusoidal variation of electric and magnetic field vectors, perpendicular to each other as well as perpendicular to the direction of propagation of wave. The velocity of these waves depends upon the electric and magnetic properties of the medium. the em wave were produced experimentally by Hertz in 1888 using Hertz Oscillator, which were of wavelength 6m. Jagdish chander bose in 1895 produced these waves which were of wave length 5mm to 25mm and in 1896, G. Marconi established a wireless communication between two stations 50km apart using em waves. In an em wave, the amplitude of electric field is 10Vm^-1 . The frequency of wave is 5xx10^(14)Hz . the wave is propagating along z-axis. If mu_0,mu_r, in_0 and in_r as the absolute permeabilty, relative permeability , absolute permitivity and relative permitivity of the medium, then the velocity of em wave in a medium is
In a ________wave particles of the medium vibrate in a direction perpendicular to the direction of wave propagation.
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