the resistivity/conductivity dependency on temperature and electric field [1, 44]. It is also clear that the formation of space charge within the insulation material is depended on both temperature and external applied field . Therefore, the dependent conductivity has a great role on space charge and then on field distribution in DC system. Under steady state DC condition the electric…
sink with through holes
It is to be noted that because of provision of through holes, passage of air takes place via these holes and the overall effect may result in more heat transfer rate.
The rectangular heatsinks used for electronic devices are arranged up in inline positions as shown in all the figures. According to length and number of fins, the dimensions of base on which the fins rest, is decided. However, the dimensions decided in this study is as follows: -
Alcohols are used in everyday life and as a result they are of great interest to chemists, specifically in regards to energy output. Energy output is extremely important when it comes to classifying a compound’s uses. For example, a compound with an explosive energy output can be implemented as a fuel for cars or other vehicles. This is the very reason that accurate information about the heat and/or energy output of alcohols are in high demand in many industries.
AC Conductivity, Ac Resistivity, Dielectric loss, and Dielectric constant are electrical properties and measured as a function of frequency.
AC Conductivity and Resistivity
AC resistance (ρac) was recorded by LCR meter model 4275 in the frequency range 1MHz to 3GHz. AC conductivity was determined by using the value of Ac resistance. As we know, Ac Conductivity is reciprocal of Ac resistance can be calculated by the relation;
ac =1/ρac (6)
The variation of AC…
Terminology and units
Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. The common symbol for current is the uppercase letter I.
The potential difference between two points.The units for potential difference are Joules per coulomb, or volts. (1 volt = 1 Joule/coulomb).
Electric charge is carried by the electrons ( negative charge) and protons (positive charge) within an atom. The…
In the following experiment, I am going to test whether the copper wire will have less Resistivity (ρ) than the iron wire, and/or the two copper wires connected together. Resistivity is defined as how strongly a particular material resists current, and is measured in Ohm-meters (Ω-m). Electrical resistance (R) is the opposite of the flow of electrons, or the passage of an electrical current.
Electrical conductivity (σ) is the opposite of resistivity and is measured in Siemens…
In this era of technology, I feel a sense of pride in being so closely associated with the field of Electrical and Electronics. Right from my school days I was inevitably enthralled by the functions of electrical and electronics equipment. By the time I was preparing for my 12th board practical examination I had quite figured out what I wanted to be or which one I would choose for something that would make me quite curious and also amaze me to a great extent that I wanted to learn more.…
I became interested with an Information Security Analyst because my father is one. Every take your child to work day I would wake up early with my dad and run to his car excited to go to his office for the day. The building is a plain, brown brick building, but every time I saw it, I instantly got excited. Walking into the office everyone knew my name, I would always wave at everyone I saw. The secretary always gave me a lollipop and called me her “Little bundle of sunlight”. I would then go…
Chapter: 1 INTRODUCTION
Basic theory of power transfer network
We know that AC lines are operated at voltage level between 10kv to 800kv.
The distribution network operates voltage level below the 100kv.
For protection against fault circuit breakers are used.
Power flow is obtained by receiving end power or sending end power.
Ex. Consider a transmission line connected between load centre and generating station. We assume line is loss less and ignore line charging, then the power flow (P)…