In an electromagnetic wave ,electric field and magnetic fields both have waveform i.e. magnitude of both can be expressed as function of **(kx -wt) i.e f(kx -vt)**. If we insert this relation in the Maxwell's one dimensional relation.

### What is the magnitude of Poynting vector?

The Poynting vector is **S=1μ0E×B**. For an electromagnetic wave we have the relation E=v×B, where the magnitude of v is c, the speed of light. So the magnitude of S is S=1μ0cE2.

### What is Poynting vector in EM waves?

The Poynting vector **represents the direction of propagation of an electromagnetic wave as well as the energy flux density, or intensity**.

### What are the significance of Maxwell's equations to electricity and magnetism?

Maxwell's equations may be combined **to demonstrate how fluctuations in electromagnetic fields (waves) propagate at a constant speed, c (299792458 m/s in vacuum)**. Known as electromagnetic radiation, these waves occur at various wavelengths to produce a spectrum of radiation from radio waves to gamma rays.

### What is the relationship between the electric field and the magnetic field of an electromagnetic wave?

But in an EM wave, the electric field and magnetic field carry the same energy. So in an EM wave, **the magnitude of the electric field is proportional to the magnitude of the magnetic field**, and the proportionality constant is c, the speed of light!

### What is the relation between electric field vector and magnetic field vector?

In an electromagnetic wave ,electric field and magnetic fields both have waveform i.e. magnitude of both can be expressed as function of **(kx -wt) i.e f(kx -vt)**. If we insert this relation in the Maxwell's one dimensional relation.

### What is the phase difference between the electric and the magnetic fields of a plane wave in an ideal dielectric and in a lossy dielectric medium?

Explanation: In a lossy dielectric, the E and H component will be in phase. This implies that the phase difference between E and H will be **0**.

### What is the phase relation between electric and magnetic oscillations in electromagnetic waves?

What is the phase relationship between these fields? (A) : **In an electromagnetic wave, the electric and magnetic fields oscillate in phase** (R) : In an electromagnetic wave, the electric and magnetic fields oscillate out of phase.

### What is the relation between an electric field E and magnetic field B in an electromagnetic wave?

That is, **EB=c** E B = c is the ratio of E-field strength to B-field strength in any electromagnetic wave.

### What is the direction of Poynting vector?

The direction of the vector product S is **perpendicular to the plane determined by the vectors E and B**. For a traveling electromagnetic wave, the Poynting vector points in the direction of the propagation of the wave.

### What is the relation between electric field and magnetic field in free space?

**E=√εoμoH**. Hint: The ratio of the magnitudes of electric and magnetic fields equals the speed of light in free space.

### What is the phase and orientation of the magnetic vector associated with EM oscillations differ from those of the corresponding vector?

The phase and orientation of the magnetic vector associated with electromagnetic oscillations differ respectively from those of the corresponding electric vector by (1) **zero and zero zero and 2 1/2 and 2 (1) 2 and zero**. Was this answer helpful?

### What are Maxwell relations discuss their significance?

Maxwell relations are thermodynamic equations which establish the relations between various thermodynamic quantities (e.g., pressure, P, volume, V, Entropy, S, and temperature, T) in equilibrium thermodynamics via other fundamental quantities known as thermodynamical potentials—the most important being internal energy,

### What is the direction and the physical significance of the Poynting vector associated with the normal component of E?

According to the Poynting vector i.e E x H, it shows **direction of flow of the electromagnetic energy**.

### What is physical significance of Maxwell equation?

Physical significance of maxwell's **Ist equation****enclosed by the closed surfaces, representing Gauss's law of electrostatics, As this does not depend on time, it is a steady state equation**. Here for positive ρ, divergence of electric field is positive and for negative ρ divergence is negative.

### What is the direction of magnetic field intensity vector due to the infinite long straight filament?

The magnetic field due to current in an infinite straight wire points **in the direction of the curled fingers of the right hand** when the thumb of the right hand is aligned in the direction of current flow.

### What is the physical significance of pointing vector?

Physical significance: Poynting vector **signifies that the flow of electromagnetic energy per unit time per unit area placed along to the direction of propagation of electromagnetic wave**.

### What is Poynting vector and its significance?

In physics, the Poynting vector (or Umov–Poynting vector) **represents the directional energy flux (the energy transfer per unit area per unit time) or power flow of an electromagnetic field**. The SI unit of the Poynting vector is the watt per square metre (W/m^{2}); kg/s^{3} in base SI units.

### What is the direction of Poynting vector Mcq?

The direction of Poynting vector is **perpendicular to the direction of propagation of wave**. Explanation: The Poynting vector is proportional to the cross product of Electric and magnetic field, E X B. Therefore, its direction is perpendicular to Electric and Magnetic waves, i.e., in the direction of propagation of wave.

### What is physical significance?

Basically, "physical significance" is **a fancy term for "definition"**. Another way of looking at it is imagining you have an object or system and you want to measure some property; what exact physical characteristics do you need to measure to calculate this property?