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For a dielectric which of the following properties hold good?
For a dielectric, the following properties generally hold good: 1. Polarization: When a dielectric is placed in an external electric field, it becomes polarized. This means that the centers of positive and negative charges within the material shift slightly, creating an internal electric field thatRead more
For a dielectric, the following properties generally hold good:
1. Polarization: When a dielectric is placed in an external electric field, it becomes polarized. This means that the centers of positive and negative charges within the material shift slightly, creating an internal electric field that opposes the external one.
2. Dielectric Constant: Also known as the relative permittivity, this is a measure of how much the electric field in the dielectric is reduced compared to a vacuum. A higher dielectric constant indicates a material that more effectively reduces the field.
3. Dielectric Strength: This is the maximum electric field that a dielectric can withstand without undergoing electrical breakdown (where it becomes conductive). Dielectric strength is usually given in Volts per unit thickness (like kV/mm).
4. Energy Storage: A dielectric material can store electrical energy by means of the polarization of its molecules. This property is utilized in capacitors, where dielectric materials are used to increase the energy storage capacity.
5. Non-conductivity: Ideally, a dielectric material does not conduct electric current, as it is an insulator. However, at very high electric fields (beyond the dielectric strength), dielectric breakdown can occur, and the material may become conductive.
6. Frequency Dependence: The dielectric properties of a material can depend on the frequency of the applied electric field. For example, the dielectric constant can decrease with increasing frequency
See lessFind the dielectric constant for a material with electric susceptibility of 4.
The dielectric constant ((K)) of a material is related to its electric susceptibility ((chi_e)) by the relation:[ K = 1 + chi_e ]Given that the electric susceptibility ((chi_e)) is 4, we can calculate the dielectric constant ((K)) as follows:[ K = 1 + 4 = 5 ]Therefore, the dielectric constant for thRead more
The dielectric constant ((K)) of a material is related to its electric susceptibility ((chi_e)) by the relation:
[ K = 1 + chi_e ]
Given that the electric susceptibility ((chi_e)) is 4, we can calculate the dielectric constant ((K)) as follows:
[ K = 1 + 4 = 5 ]
Therefore, the dielectric constant for the material is 5.
See lessA dielectric can be made a conductor by
A dielectric can be made a conductor by increasing its temperature, applying a strong electric field, or doping it with impurities, any of which can provide sufficient energy to its electrons, allowing them to overcome the insulating gap and move freely, thus conducting electricity.
A dielectric can be made a conductor by increasing its temperature, applying a strong electric field, or doping it with impurities, any of which can provide sufficient energy to its electrons, allowing them to overcome the insulating gap and move freely, thus conducting electricity.
See lessIdentify a good dielectric.
A good dielectric material is one that can support electrical polarization while being an insulator, meaning it does not allow the flow of charge through it. Examples of such materials include:- Polytetrafluoroethylene (PTFE), also known as Teflon.- Silica (SiO2), particularly in its pure, amorphousRead more
A good dielectric material is one that can support electrical polarization while being an insulator, meaning it does not allow the flow of charge through it. Examples of such materials include:
– Polytetrafluoroethylene (PTFE), also known as Teflon.
– Silica (SiO2), particularly in its pure, amorphous form.
– Polyethylene, a common plastic used in a variety of applications.
– Titanium dioxide (TiO2), often used in high-index of refraction applications.
– Barium titanate (BaTiO3), known for its high permittivity.
These materials are extensively used in capacitors, cables, and other electrical insulation applications due to their high electric strength, low dielectric loss, and other desirable properties that allow them to store and sustain an electric field with minimal energy loss.
See lessA dielectric is always an insulator. But an insulator is not necessarily a dielectric. State True/False.
True
True
See lessComputer instructions written with the use of English words instead of binary machine code is called
Assembly Language
Assembly Language
See lessThe magnetic storage chip used to provide nonvolatile direct access storage of data and that have no moving parts are known as
Solid State Drives (SSDs)
Solid State Drives (SSDs)
See lessWho developed a mechanical device in the 17th century that could add, subtract, multiple, divide and find square roots?
The mechanical device developed in the 17th century that could add, subtract, multiply, divide, and find square roots was developed by Blaise Pascal, who is often credited with creating one of the early mechanical calculators, the Pascaline, around 1642. However, the Pascaline primarily performed adRead more
The mechanical device developed in the 17th century that could add, subtract, multiply, divide, and find square roots was developed by Blaise Pascal, who is often credited with creating one of the early mechanical calculators, the Pascaline, around 1642. However, the Pascaline primarily performed additions and subtractions.
For a device that could perform a wider array of calculations including multiplication, division, and finding square roots, you might be thinking of the work of Gottfried Wilhelm Leibniz. Leibniz improved upon Pascal’s designs and created the Step Reckoner (or Leibniz Wheel) in the late 17th century, which could perform addition, subtraction, multiplication, division, and had capabilities for calculating square roots through repeated operations.
See lessAn output device that uses words or messages recorded on a magnetic medium to produce audio response is
A tape player or tape recorder.
A tape player or tape recorder.
See lessWho built the world’s first electronic calculator using telephone relays, light bulbs and batteries?
The world's first electronic calculator that used telephone relays, light bulbs, and batteries was built by Konrad Zuse. His machine, known as the Z1, was completed in 1938 and is considered the first freely programmable computer.
The world’s first electronic calculator that used telephone relays, light bulbs, and batteries was built by Konrad Zuse. His machine, known as the Z1, was completed in 1938 and is considered the first freely programmable computer.
See less