write any four characteristics of electromagnetic waves

In an electromagnetic wave, the oscillating electric and magnetic fields are in the same phase and their magnitudes have a constant ratio. Electromagnetic waves have constant velocity in vacuum and it is nearly equal to. The Electromagnetic wave is having the characteristics of reflection just like the light waves. Property 2: They propagate by varying electric fields and magnetic fields, such that these two fields are at right angles to each other and at a right angle with the direction of propagation of the wave. We are giving a brief of these as well for your better understanding. (a) Given,Radius of capacitor plates, r = 12 cm = 0.12 mdistance between the plates, d = 5.0 mm = 5 × 10-3mCharge carried, I = 0.15 APermittivity of medium, ε0 = 8.85 × 10-12 C2 N-1 m2∴ Area of cross-section of plates, A = πR2 = 3.14 × (0.12)2 m2 Capacitance of parallel plate capacitor is given by                        C = ε0Ad         = 8.85 × 10-12× (3.14) × (0.12)25 × 10-3         = 80.1 × 10-12 = 80.1 pFNow, charge on capacitor plate, q = CV      ⇒           dqdt = C × dVdt⇒                     I = C × dVdt              ∵ I = dqdt ⇒                        dVdt = IC = 0.1580.1 × 10-12                                                 = 1.87 × 109 Vs-1 (b) Displacement current is equal to the conduction current i.e., 0.15 A. Light is an example of an electromagnetic wave. Your email address will not be published. Property 1: Electromagnetic waves are transverse in nature. Accelerated charges are responsible to produce electromagnetic waves. Your email address will not be published. 2. Give two characteristics of electromagnetic waves. Use the formula E = hv (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. Description: Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. Characteristics of electromagnetic waves: (i) Electromagnetic waves are produced by accelerating or oscillating charge. The formula above shows that they oscillate in phase. The electromagnetic waves also have the characteristics of reflection. (2marks) 2. Wave characteristics. The direction of propagation of the electromagnetic wave is given by vector cross product of the electric field and magnetic field. The inherent characteristic of electromagnetic waves is its frequency. Delhi - 110058. In National 4 Physics examine the properties of waves and use the wave equation, v = f λ, to relate the speed, frequency and wavelength. Search. (ii) E.M. waves do not require any material medium for their propagation. Electromagnetic waves can show interference or diffraction. Property 3: Electromagnetic We know that electromagnetic waves include different types of waves like radio waves, microwaves, Infrared rays, Visible rays, Ultraviolet rays, X-rays, and gamma rays. Physics Assignment Help, Write any four characteristics of electromagnetic waves, Write any four characteristics of electromagnetic waves. (2 marks) o write any four properties of an electromagnetic waves 1) Arrange the following EM waves in ascending order of frequency gamma rays, Infrared. Electromagnetic radiation can be defined as a form of energy that is produced by the movement of electrically charged particles traveling through a matter or vacuum or by oscillating magnetic and electric disturbance. Electromagnetic wave equation describes the propagation of electromagnetic waves in a vacuum or through a medium. Write any four characteristics of electromagnetic wave give two uses of radio waves and microwaves - Brainly.in. (b) Displacement current is equal to the conduction current i.e., 0.15 A. Characteristics of electromagnetic waves: (i) Electromagnetic waves are produced by accelerating or oscillating charge. Newton proposed the particle theory of light to explain the bending of light upon reflection from a mirror or upon refraction when passing from air into water. Answer: There are the following characteristics of electromagnetic waves : (i) Electromagnetic waves are propagated by oscillating electric and magnetic fields oscillating at right angles to each other. The energy is carried by the electric and magnetic fields of electromagnetic waves are equal, i.e. Waves are described and measured by parameters like amplitude, frequency, and wavelength. Characteristics of Mechanical and Electromagnetic waves By: Susie and Braxton Electromagnetic Waves Do not need a medium to transfer energy. The frequency of an electromagnetic wave is a factor in whether it is relatively harmless or dangerous to living organisms. Thus, an electromagnetic wave consists of sinusoidal time-varying electric and magnetic fields, and both the fields are perpendicular to each other. From ripples on a pond to deep ocean swells, sound waves, and light, all waves share some basic characteristics. They are created due to the vibration of an electrical charge. Electromagnetic waves have constant velocity in vacuum and it is … We know that waves carry energy from one place to another and that they disturb their medium in a periodic fashion. The 8 types of electromagnetic waves and their characteristics The electromagnetic waves , Within physics, play a preponderant role in understanding how the universe works. Electromagnetic waves are transverse waves. 4. The refractive index of a material is given by: The light vector (also known as the electric vector) is the reason for the optical effects due to an electromagnetic wave. Here,          Frequency of the plane EM wave, v = 2 × 1010HzAmplitude of electric field,  E0 = 48 Vm-1  Therefore, Wavelength of the wave, λ = cv =3 × 1082 × 1010m = 1.5 × 10-2m Amplitude of oscillating magnetic field,B0 = E0c = 483 × 108T = 1.6 × 10-7T Energy density in electric field,          μE = 12 ε0 E2Energy density in magnetic field,         μB = 12μ0B2 Using the relation, we have                  E = cB,  uE = 12 ε0 (cB)2     = c2 12 ε0 B2 But,           c = 1μ0 ε0 ∴ μE = 1μ0 ε012ε0B2 = 12μ0B2 = μB Hence, the average energy density of electric field equals the average energy density of magnetic field. (a)    What is the wavelength of the wave? (a) i) Write any four properties of an electromagnetic waves. Find wavelength of electromagnetic waves of frequency 5 x 10 19 H z in free space. 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The terminology of different parts of the electromagnetic spectrum is given in the text. Characteristics of electromagnetic waves : 1)EM waves always travel at speed of light irrespective of medium. (ii) The oscillations of and are perpendicular to each other and are in same phase. Velocity – The velocity of electromagnetic wave in vacuum is 3 × 10 8 m/s. (iv) E.M. waves are transverse in nature. (a) Here,Radius of the circular plate, R = 6.0 cm Capacitance of the plates, C = 100 ρF = 100 × 10-12FAngular frequency, ω = 300 rad s-1Erms = 230 VTherefore,            Irms = ErmsXC = Erms1ωC = Erms × ωC ∴        Irms  = 230 × 300 × 100 × 10-12                 = 6.9 × 10-6A = 6.9 μA (b) Yes, the conduction current is equal to the displacement current.I = ID,  whether conduction current, I is steady d.c. or a.c. Electromagnetic wave propagation does not require any material medium to travel. Electromagnetic Wave Equation. Write any five electromagnetic waves in the order of decreasing frequency and sa metala write any two properties and uses of each This can be shown below :          ID = ε0d(ϕE)dt = ε0 ddt(EA)     ∴  ϕE = EA⇒      ID = ε0AdEdt            = ε0AddtQε0A      ∵ E = σε0 = Qε0A ⇒     ID = ε0A × 1ε0AdQdt    = dQdt = I(c) We know that,                       B = μ02πrR2ID This formula goes through even if displacement current, ID (and therefore magnetic field B) oscillates in time. 2021 Zigya Technology Labs Pvt. Then, 232, Block C-3, Janakpuri, New Delhi, ultraviolet, 2 3 (2marks) microwaves (b) A standing wave produced in 1.2 m long string which has a mass per unit length of 1.84 x 10 kg/m. They are hence known as ‘electromagnetic’ waves. (ii) They do not require any material medium for propagation. The changes in the electric field or the magnetic field represent the wave disturbance in the EM waves. Digital radio is broadcast at a frequency of 2.5 billion hertz per second, or 2.5 GHz. Their frequencies remain unchanged but its wavelength changes when the wave travels from one medium to another. Accelerated charges are responsible to produce electromagnetic waves. Newton's contemporary Christiaan Huygens showed that a wave theory of light could explain the laws of reflection and refraction. The inherent characteristic of an electromagnetic wave is its frequency. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s-1. Electromagnetic waves are transverse in nature as they propagate by varying the electric and magnetic fields such that the two fields are perpendicular to each other. (iv) E.M. waves are transverse in nature. All EM waves are made up of photons that travel through space until they interact with matter; some waves are absorbed and others are reflected. A parallel plate capacitor (Fig.) (c)    Determine the amplitude of B at a point 3.0 cm from the axis between the plates. Electromagnetic waves are not deflected by electric or magnetic field. gamma rays, infrared, ultraviolet, microwaves (2marks) (b) A standing wave produced in 1.2 m long string which has a mass per unit length of 1.84 x 103 kg/m. Mechanical Waves Need a Figure shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 mm. (a)    What is the rms value of the conduction current? Electromagnetic waves may be polarized. (iv) E.M. waves are transverse in nature. Listed below are some important characteristics and properties of electromagnetic waves. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation. Write any four characteristics of electromagnetic waves. ii) Arrange the following EM waves in ascending order of frequency. Broadly speaking, a wave is a disturbance that propagates through space. In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 × 1010 Hz and amplitude 48 V m-1. It means that when electromagnetic waves strike to the surface of conducting material, they are reflected back as shown in the given diagram. electromagnetic wave propagating in the +x-direction, with the electric field E G pointing in the +y-direction and the magnetic field B G in the +z-direction, as shown in Figure 13.4.1 below. Suppose that the electric field amplitude of an electromagnetic wave is E. = 120 N/C and that its frequency is v = 50.0 MHz. Required fields are marked *. Micro-waves. We previously learned a lot about the structure and nature of waves. Characteristics of waves. (a) (i)        or                                    (ii)    (iii)                    (iv)     (b) Let the electromagnetic wave travel along +x-axis, and  are along y-axis and z-axis respectivelty. Write any four characteristics of electromagnetic waves give two uses of radio waves and microwaves - 8289829 1- Electromagnetic waves are produced by accelerating or oscillating charge. We can see waves in water and hear waves as sound, but we haven't yet discussed the waves that we perceive as light. Visible light is only a small part of a grou… Definition: Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The ratio of the amplitudes of electric and magnetic fields is equal to the velocity of the electromagnetic wave. The magnetic and the electric fields come at 90° to each other and the combined waves move perpendicular to both electric and magnetic oscillating fields occurring the disturbance. (iii) E.M. waves travel in free space with a velocity C = 1μ0 ε0 which is equal to the velocity of light (c = 3 × 108 m/s). The formula above shows that they oscillate in phase.Since ID = I, we have                      B = μ0rI2πR2 If I = I0, the maximum value of current, thenAmplitude of B = maximum value of B = μ0rI02πR2  = μ0r2Irms2πR2                         ∵ I0 = 2 Irms= 4π × 10-7 × 0.03 × 2 × 6.9 × 10-62 × 3.14 × (0.06)2T= 1.63 × 10-11T. The characteristics of the electromagnetic spectrum are the propagation features and the amount of information which signals can carry. Radio-waves 2. (iii) In an electromagnetic wave, the electric Vector(E) and magnetic Vector(B) field vectors are at right angles to each other and to the direction of propagation. The electromagnetic (EM) spectrum encompasses all wave frequencies, including radio, visible light and X-rays. (b)    What is the amplitude of the oscillating magnetic field? Capacitance of parallel plate capacitor is given by. Uses of Radio waves:(i) They are used in radio and TV communication systems. In his view, light was a stream of particles emitted from a light source, entering the eye to stimulate sight. Ltd. Download books and chapters from book store. We take the current to be the sum of the conduction and displacement currents. Electromagnetic Spectrum is the classification of these waves according to their frequency. Characteristic of electromagnetic waves are as follows: - (i) They do not require any material medium for their propagation. The changing electric and magnetic fields result in the propagation of electromagnetic waves (or light waves) even in vacuum.

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