Essays on Conductors

Lab report: electrical conductance

Lab report: electrical conductance

Introduction

Electrical conductance is the property of an electrical conductor that determines how fast it contacts – how easily current flows through it (Shaw, 1911, p. 281). When a potential difference is applied across various types of conductors, current flows through the conductors at different rates. The rate at which the current flows through a particular conductor for a particular potential difference is dependent on the specific property of the conductor, referred to as electrical conductance. Conductance determines how well current flows through a particular conductor. Conductance is the inverse (reciprocal) of the property of the conductor ...

Three phase induction motors

Introduction The three-phase induction machine is the most widely used among the rotating machines. An induction machine offers an almost constant speed within its normal operating range when operated off a constant-voltage, constant-frequency, and with the electric power source. The cost of purchasing these machines is very low, and they require little maintenance. However, speed control is difficult and very expensive. Therefore, the rotor current of the three phase induction motors is not induced by electrical connections, but rather the rotation of magnetic field.

Squirrel Cage Rotor construction

The rotor type of the motor is made up of a laminated core which is ...

It is evident, and all would agree, that the house should be strong, durable, built quickly and at a relatively inexpensive cost. In most cases, disputes begin on the choice of building materials. Which would be stronger, thermal insulated, warmer – wood, brick, concrete, or polymer-based materials? Which of them are considered environmentally friendly and which are not? Until recently, metal, steel in particular was not part of the discussion on the material for the construction of the frame of an individual house. However, the development of energy-efficient technology, the translucent structures based on steel beams are built today even ...

Abstract

The slaves in the Southern part of US faced inhuman treatment where they were by law, the property of their owners. The slaves were subjected to harsh treatments including working for long hours in the fields while returning at night only to be met by meager food to fulfill their hunger needs. The husbands were taken from their wives with professional slave catchers tasked with tracking the runaway slaves and torturing those who were suspected to have the intentions of escaping. To be able to save the slaves and make them see the light of freedom, it was necessary ...

Microbial fuel cells are devices that employ bacterial or other microbial cells to generate electricity (Singh, Pratap, Baranwal, Kumar and Chaudhary, 2010). Cells generally carry out electron transfer and oxidation-reduction reactions during normal metabolic activities. Electrons generated during these reactions can be made to flow through an external circuit to generate current. Fig 1. Depicts a typical MFC. The anodic compartment consists of microbial culture in glucose or other medium (Singh et al, 2010). Wastewater can also be used as a substrate source for microbes in a MFC intended for effluent treatment application. The microbial cells breakdown complex substrates ...

Albert

The purpose of this paper is to try to analyse two symphony concerts which are performed by the Danish conductor Thomas Sondergard. The both concerts consist of the pieces of music of Russian composer Dmitri Shostakovich and his symphonies No. 5 (C mol) and No. 11 (D mol). These concerts do not have lyrical mood, but they draw bright musical picture which is rather dramatic. Abrupt change of rhythms, dissonance notes, dialogues of musical instruments immerse the listener in the world of misery and opposition to the evil. Both symphonies have life-asserting character though.1 The four part symphony No. ...

Introduction

The real name of Harriet Tubman at birth was Araminta Ross. She was one of the eleven children of Benjamin and Harriet. She was “hired out” as a nurse of a small child by one of the masters. She used to stay awake throughout the night to ensure that the small baby did not cry and wake the mother. When Ross fell asleep, the master would whip her. The brutal suffering she went through since young made her determined to gain freedom. She is remembered as one of the conductors who freed many slaves through the "Underground Railroad." In ...