Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Electrical Properties of Dielectric Material
A loss of energy which eventually produces a rise in temperature of a dielectric placed in an alternating electric field is called "dielectric loss". The dielectric material separates the two electrodes or conductors are stressed when subject to a potential. When the potential is reversed, this change of stress is reversed involves molecular rearrangement with the dielectric. This includes energy loss with every reversal. This is because then the molecules have to overcome a certain amount of internal in the process of alignment. The energy exhausted in the procedure is released as heat in the dielectric. Dielectric losses results from the heating effect on the dielectric material between the conductors. Power from the source is utilized in heating the dielectric. The heat produced is dissipated into the surrounding material. When there is no potential difference between two potential, the atoms in the dielectric material among them are normal and the orbits of the electrons are circular. When there is some potential difference between two conductors, the orbits of the electrons vary. The excessive negative charge on one conductor repels electrons on the electrons dielectric towards the positive conductor and thus distorts the orbit of the electrons. A change in path of electrons requires more energy, introducing a power loss. The atomic structure of rubber is harder to deform then the structure of some other dielectric materials. Such as polythene, distort easily. Therefore polythene easily is often used as a dielectric because less power in consumed when its electrons orbit is distorted. When a perfect insulator is subjected to insulating voltage it is like applying alternating voltage to a perfect capacitor. In such a case there is no consumption of power. Only vacuum and purified gases approach this perfection in such cases the charging current would lead the applied voltage by 90 exactly. This would mean that there is no power loss in the insulation. In most insulating materials that is not the case. There is definite amount of dissipation energy when an insulator is subjected to alternating voltage. It is dissipation of energy that is called dielectric loss. In commercial insulators the leakage current does not lead applied voltage by exactly 90. The phase angle is always less than 90. For an insulator having a voltage V applied to a frequency f Hz the dielectric power loss can be calculated.
What type of waves are electromagnetic waves? Feedback: Electromagnetic waves are transverse waves that the oscillations of the electric and magnetic fields are at right
Under standard state conditions at 37 o C, a biochemical reaction : A ↔ B + C has an equilibrium constant K = 0.0422 mol/dm 3 . (i) Calculate the standard
Equatorial Line and Neutral point: Equatorial Line: The imaginary line joining the centre of mass and perpendicular to the line joining the poles of a bar magnet is called th
concave grating and rowland''s mounting theory
what is the equation for work
If small test charge is taken as positive than why measured value of electric intensity be somewhat less than the actual value of elctric intensity and vica versa
A dual-wavelength spectrometer uses 780 nm and 830 nm. The molar extinction coefficients for oxy-hemoglobin (HbO 2 ) and deoxy-hemoglobin (Hb) at these two wavelengths are: e_HbO 2
Cathode rays are : (1)Protons (2)Electrons (3)Neutrons (4)alfa -particles Ans; (2)Electrons
Moment of Thin Spherical Shell About Axis This problem can be set up in spherical coordinates so that conversions from Cartesian coordinates are not required. The mass element
What are the Ultrasonic Cleaning Applications? Several of the Ultrasonic Cleaning applications are: a. Ultrasonic Cleaners into Scientific Labs Lab Glassware, Test Tubes,
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd