The Poynting vector describes a flow of energy whenever electric and magnetic fields are present. Consider a long cylindrical wire of radius r with a current I in the wire, with resistance R and voltage V. From the expressions for the electric field along the wire and the magnetic field around the wire, obtain the magnitude and direction of the Poynting vector at the surface. Show that it accounts for an energy flow into the wire from the fields around it that accounts for the Ohmic heating of the wire.

Q: If the maximum E-component of an electromagnetic wave is 600 V/m, what is the maximum B-component?

A:

Q: A planar electromagnetic wave is propagating in the +x direction. At a certain point P and at a…

A: The electromagnetic wave travels in the direction perpendicular to oscillations of electric and…

Q: If the electric field E of light wave is parallel to the plane of incident and determine the…

A: When the electric field E off light wave is parallel to the plane of incident then amplitude…

Q: A beam of unpolarized light shines on a stack of five ideal polarizers, set up so that the angles…

A:

Q: Prove, for a plane electromagnetic wave that is normally incident on a flat surface, that the…

A: The expression for the radiation pressure due to reflected radiation beam is,

Q: We have a plane electromagnetic wave traveling in the +z direction. As you may recall, plane waves…

A:

Q: True or False. If false, please explain The time average of the magnitude of the Poynting vector is…

A: Let the electric field intensity of EM wave = E  Let the magnetic field intensity of EM wave = B

Q: (d) Assuming that the average magnitude of the Poynting vector for solar radiation at the surface of…

A:

Q: A 150-W lightbulb emits 5% of its energy as electromagnetic radiation. What is the magnitude of the…

A: The power used is 5% of the original power.

Q: An unpolarized beam of light (intensity I0) is moving in the x-direction. The light passes through…

A: Expression of the intensity of the light transmitted by the last polarizer. I=I0 cos248°…

Q: An electromagnetic wave is travelling in free space (of permittivity eo) with electric field E=…

A: For a given Electric Field, the associated magnetic field is perpendicular to the electric field and…

Q: At one location on the Earth, the rms value of the magnetic field caused by solar radiation is 1.85…

A: According to guidelines we need to solve only first three sub-part kindly repost other parts in the…

Q: If you have completely polarized light of intensity 165  Wm2, what will its intensity be after…

A: We know intensity of light after passing through a polarizer is…

Q: The electric field in a sine wave has a peak value of 32.6 mV/m. Calculate the magnitude of the…

A: Given: The strength of the electric field is 32.6 mV/m.

Q: If E = electric field and B = magnetic field, is E × B a vector or a pseudovector? Comment: E × B/µ0…

A: E x B

Q: Show that the Poynting vector associated with the electromagnetic wave E = Eo cos(wt – kx)j, B Eo…

A: The solution can be given as follows :-

Q: Two coaxial parallel disks of equal diameter 1 m are originally placed at a distance of 1 m apart.…

A: It is given that,

Q: At one location on the Earth, the rms value of the magnetic field caused by solar radiation is 1.90…

A:

Q: At an instant in time, the electric and magnetic fields of an electromagnetic wave are given by E =…

A: Given that:- E=-7.69×10^-3 (k cap) V/m  B=-2.56×10^-11 (i cap) T

Q: Experiments show that the groundspider Drassodes cupreus uses one of its several pairs of eyes as…

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Q: If the wave vector k of the plane wave moving in the xz plane is k = 2i+j ; According to this,…

A: Given : Plane wave moving in xz plane Wave vector k→=2i^+j^

Q: At one location on the Earth, the rms value of the magnetic field caused by solar radiation is 1.90…

A:

Q: Plane - polarized light is incident on a single polarizing disk, with the direction of E 0 parallel…

A: Formula to calculate the intensity of a plane polarized light from Malus’s Law is,

Q: In the figure, a beam of light, with intensity 44 W/m2 and polarization parallel to a y axis, is…

A: Given, a beam of light, with intensity I0=44 W/m2 and polarization parallel to a y-axis, is sent…

Q: Find and describe the electromagnetic field produced by a superposition of two equal-amplitude,…

A: (a) When a plane of an electromagnetic wave propagating along the z-axis, the electric field Ex is…

Q: H.W.: The maximum magnetic field at a distance of 10 m from an isotropic point light source is 9 ×…

A: The expression for the maximum value of the electric field, E=cB   Substitute, E=3×108 m/s9×10-9…

Q: H.W.: The maximum magnetic field at a distance of 10 m from an isotropic point light source is 9 ×…

A: Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an…

Q: Plane-polarized light is incident on a single polarizing disk, with the direction of E0 parallel to…

A:

Q: A beam of polarized light is sent into a system of two polarizing sheets. Relative to the…

A: For the first sheet,

Q: A planar electromagnetic wave is traveling in the +x direction. At a certain point P and at given…

A: AT ANY INSTANT E =0.09 V/m j wave travel in x direction E= V XB

Q: a. Why does a capacitor act as a short circuit at high frequencies and as an open circuit at low…

A: Part a: At high frequencies the capacitive reactance of a capacitor becomes very small, nearly…

Q: What is the physical significance of the Poynting vector?

A: The electromagnetic waves carry energy along with them while travelling through space. The energy…

Q: The magnetic field of a plane electromagnetic wave in empty space in SI system is given by…

A: Magnetic field of an EM wave is given by,  B=10 cos(k.r-wt)z

Q: the electric field vector of an electromagnetic wave is pointing 60 degrees above the x axis on the…

A: An electromagnetic wave is a sinusoidally oscillating combination of perpendicular electric and…

Q: The intensity of a polarized electromagnetic wave is 10 W/m2. What will be the intensity after…

A: Given data The intensity of the polarized electromagnetic wave is Io=10 W/m2 The  first angle of…

Q: the figure, a beam of unpolarized light, with intensity 49 W/m2, is sent into a system of two…

A:

Q: Ē, = 0 Ē, = 0 Ē, = 10 cos(37x + a × 10°t)

A: Given that,  Electric field vectors are Ex→=0 Ey→=0 Ez→=10 cos(3πx+π×109t)

Q: At an instant in time, the electric and magnetic fields of an electromagnetic wave are given by E =…

A: Formula for pointing vector is

Q: A plane electromagnetic wave traveling in a vacuum has a frequency of ( f= 101º Hz ) and the…

A:

Q: Suppose a polarizing filter reduces the intensity of polarized light to 65 % of its original value.…

A:

Q: Describe the physical significance of the Poynting vector.

A: We need to describe the physical significance of the Poynting vector for this we need to understand…

Q: The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724…

A: The average value of the magnitude of the Poynting vector of a planar electromagnetic wave is…

Q: What is the average magnitude of the Poynting vector 4.50 mi from a radio transmitter broadcasting…

A: Pavg = 240 kW r = 4.50 mi =7242 metres

Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”