Essays on Alternating

A DC circuit consists of a source (e.g. battery or power supply) and a load (e.g. light bulb or electronic instrument). The electrons move from the negative terminal of the source, towards the load and then return to the positive terminal of the source, i.e. the electrons flow in only one direction . This movement of electrons will continue as long as there is a closed circuit. In contrast, the source in the AC circuit is constantly changing. The voltage of the source builds up and electrons flow through the circuit in the same way as for the DC circuit. ...

Solar energy harnessing through the use of solar panels installed in small homes presents better alternative to the hydroelectric provided through the national grid. While the use of solar panels may provide several advantages over the use of hydroelectricity, its usage presents several pitfalls to the user. It is imperative to investigate and outline the possible costs and advantages associated with the use of solar panels as a source of harnessing solar energy before installation is started. In most cases, the decisions concerning the installation of solar panels as the primary source of electricity are normally based on the ...

[City and State]

Introduction

Structures such as large buildings can create its own unique internal environment that can significantly impact the comfort and health of its occupants. After many years of investigating and studying building infrastructures, engineers and designers have increased their understanding and knowledge on the environmental conditions that exists within the building in relation to its physical properties. For the same reason, a solid background in building physics is an integral part of a building’s design, particularly in this modern era wherein green buildings are the rising trend. Most modern buildings integrate building physics prior to construction ...

Introduction

Taking measurements may require the conversion of the measured quantity to electrical quantity. Transducers are devices or elements that perform this function by transforming physical quantities such as quantities like sound, light, or temperature into electrical signals like current, voltage, or capacity. Transducers consist of inputs, sensing elements, transduction elements, signal processing, and electrical outputs. The inputs known as the measurands are the quantities, states, or properties that are to be translated into electrical outputs. The sensing elements accurately measure these input energies and sends the information to the transduction elements to be transformed into the desired form. The ...

The poem basically talks about Emily Dickinson’s inner feelings. From the way the poem is structured and the way she articulates her wordings, it directly points out towards her inner feelings. However, it’s not just inner feelings in the ordinary sense, the poem greatly relates to her inner struggles. Throughout the poem, Dickinson significantly speaks of her struggles, as a result, she questions God several times. However, she primarily relies on faith at all times more so in the suffering that she endures (Dickinson 16). Moreover, she also touches on the theme of her confusion in respect ...

The Stormy Weather starring Bill Robinson and Lena Horne was one of the most successful Broadway musicals ever created especially by a full-African American actors and actresses. The film presents a charming combination of jazz, singing, dancing, and occasional rhythmic rants of the characters from the story. At first, I was quite skeptical whether the film will make me interested until the end; however, the Stormy Weather’s brilliant and happy music creates a lively atmosphere which is impossible to deny. The film was set against the backdrop of the Progressive era, approximately during the 1920s, considering the clothes ...

The correlation between climate and vegetation is evident in Africa, where, despite the rapid destruction of natural vegetation by humans and animals, there are still vast areas of natural vegetation. There are two main zones in Sub-Saharan Africa.

AREAS OF EQUATORIAL FOREST

The rainforests cover just under 1000 km in latitude and approximately 2250 km from west to east, from the Cameroon coast and Gabon to the eastern borders of Congo - Kinshasa (to the mountains flanking the Rift Valley to the Ruwenzori, the Virunga Mountains and Ugoma (northwest of Lake Tanganyika). The equatorial forest has a wide variety of trees (very high ...

Abstract

Permanent magnet synchronous motors (PMSM) are a type of motors that have permanent magnets mounted on the rotors instead of the rotor windings. This particular design gives the motor a few advantages over ordinary induction synchronous motors. The magnets attached to the rotor do not require excitation, which reduces the power consumption in PMSM. This gives the motor high operational efficiency and reduces the motor active diameter. PMSM are therefore associated with applications that require high torque but have limited operation space. The permanent magnets suffer from flux leakage and are therefore aligned in a pattern that minimizes flux ...

Re: extended definition of solar power and nuclear power

Purpose This memo is an extended definition of solar power and nuclear power as sources of energy. Introduction Solar power is energy from the sun. This energy is harnessed by collecting sunlight and converting it to electricity (Winter et al. 4). The cells found in the solar panels make this conversion possible. The conversion of sunlight to electricity can either be done indirectly by the use of a concentrated solar panel or directly by use of the photovoltaic cell. Nuclear power, on the other hand, utilizes nuclear reactions to produce nuclear energy (Murray 495). This energy is found in ...

Biography

Nikola Tesla was born on July 10, 1856 in Smiljan, Croatia, as a fourth child to parents Milutin Tesla and Djuka Mandic. His father was a Serbian Orthodox Priest while his mother was an inventor of household appliances. Although pressured by his father to join the priesthood, Tesla was mostly interested in sciences. His calling was towards electrical engineering, for which he studied at the Polytechnic Institute in Graz, Austria, the Realschule, Karlstadt and the University of Prague. Tesla moved to Budapest and began his career working with a telephone company in 1881 and it was during this time ...

Solving Social Problems: Solar Energy in Rural India

The developing world grapples with the lack of access to electricity. Third world countries have poor electrical infrastructure which is still in the nascent stages of development. As a result, majority of people, especially those living in rural areas, have no access to electricity. The reach of the electrical grid in countries is limited to towns, and the poor who have access to electrical power supply suffer frequent and prolonged power blackouts. As a result, people in such countries result to unclean and unhealthy means of lighting, such as kerosene and diesel generators. The kerosene lamps cause respiratory problems ...