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An EM wave from air enters a medium. The electric fields are E1 = E01 x cos [ 2 pie v { z/c – t } ] in air and E 2 =E 02 x ^ cos[k(2z−ct)] in medium, where the wave number k and frequency v refer to their values in air. The medium is non-magnetic. If ϵ r 1 and ϵ r 2 refer to relative permittivities of air and medium respectively, which of the following options is correct?
29
Oct
An EM wave from air enters a medium. The electric fields are E1 = E01 x cos [ 2 pie v { z/c – t } ] in air and E 2 =E 02 x ^ cos[k(2z−ct)] in medium, where the wave number k and frequency v refer to their values in air. [...]
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An EM wave from air enters a medium. The electric fields are E1 = E01 x cos [ 2 pie v { z/c - t } ] in air and E 2 =E 02 x ^ cos[k(2z−ct)] in medium ,
where the wave number k and frequency v refer to their values in air. The medium is non-magnetic. If ϵ r 1 and ϵ r 2 refer to relative permittivities of air and medium respectively ,
which of the following options is correct? ,
A source of sound is travelling with a velocity of 30 m/s towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20ms in a direction at 60^∘C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound is 340 m/s)
29
Oct
A source of sound is travelling with a velocity of 30 m/s towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20ms in a direction at 60^∘C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound [...]
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a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz ,
A source of sound is travelling at 100/3 m/s along a road ,
then the value of f is (given velocity of sound = 340m/s) ,
towards a point A. When the source is 3m away from A ,
A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is
29
Oct
A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 [...]
During the propagation of electromagnetic waves in a medium :
29
Oct
During the propagation of electromagnetic waves in a medium : During the propagation of electromagnetic waves in a medium : October 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A source of sound is travelling at 100/3 m/s along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz, then the value of f is (given velocity of sound = 340m/s)
29
Oct
A source of sound is travelling at 100/3 m/s along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. [...]
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a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz ,
A source of sound is travelling at 100/3 m/s along a road ,
then the value of f is (given velocity of sound = 340m/s) ,
towards a point A. When the source is 3m away from A ,
Match List -I ( electromagnetic wave type ) with List – II ( its association / application ) and select the correct option from the choices given below the lists:
29
Oct
Match List -I ( electromagnetic wave type ) with List – II ( its association / application ) and select the correct option from the choices given below the lists: An electromgnetic wave in vaccum has the electric and magnetic field E and B which are always perpendicular to each other. The direction of polarization [...]
A source of sound produces waves of wavelength 60 cm when it is stationary if the speed of sound in air is 320 m/s and source moves with speed 20 m/s, the wavelength of sound in the forward direction will be nearest to
29
Oct
A source of sound produces waves of wavelength 60 cm when it is stationary if the speed of sound in air is 320 m/s and source moves with speed 20 m/s, the wavelength of sound in the forward direction will be nearest to A source of sound produces waves of wavelength 60 cm when it [...]
An electromgnetic wave in vaccum has the electric and magnetic field E and B , which are always perpendicular to each other. The direction of polarization is given by X and that of wave propagation by K. Then
29
Oct
An electromgnetic wave in vaccum has the electric and magnetic field E and B , which are always perpendicular to each other. The direction of polarization is given by X and that of wave propagation by K. Then An electromgnetic wave in vaccum has the electric and magnetic field E and B which are always [...]
The magnetic field in the plane electromagnetic wave is given by Bz = 2 x 10^-7 sin ( 5 x 10^3x +1.5 x 10^11 t ) tesla. The expression for electric will be
29
Oct
The magnetic field in the plane electromagnetic wave is given by Bz = 2 x 10^-7 sin ( 5 x 10^3x +1.5 x 10^11 t ) tesla. The expression for electric will be The magnetic field in the plane electromagnetic wave is given by Bz = 2 x 10^-7 sin ( 5 x 10^3x +1.5 [...]
In an electromagnetis wave , teh electric field oscillated sinusoidally with amplitude 45 V/m, the rms value of oscillating magnetic filed will be
29
Oct
In an electromagnetis wave , teh electric field oscillated sinusoidally with amplitude 45 V/m, the rms value of oscillating magnetic filed will be In an electromagnetis wave teh electric field oscillated sinusoidally with amplitude 45 V/m the rms value of oscillating magnetic filed will be October 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM [...]