The wattmeter is an electrodynamic instrument for measuring the electric power or the supply rate of electrical energy of any given circuit. The device consists of a pair of fixed coils‚ known as current coils‚ and a movable coil known as the potential coil. The current coils are connected in series with the circuit‚ while the potential coil is connected in parallel. Also‚ on analog wattmeters‚ the potential coil carries a needle that moves over a scale to indicate the measurement. A current flowing
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1. How is electricity produced? The most simple way of producing static ekectricity is by rubbing or friction. When you rub two different kind of materials that are insulator‚ you can transfer electrons from one substance to another. Nowadays‚ to create electricity we use battery and generators. Voltage can be made by heart‚ light or mechanical pressure. http://science.howstuffworks.com/electricity-info2.htm 2. Where and how is electricity used? Electricity gives us ability to produce
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Title : C2 Investigating the capacitance of a capacitor I. Objective : * To investigate the factor which affect the capacitance of a parallel-plate capacitor using a reed switch. II. Apparatus * Reed Switch * Signal generator * Capacitor Plates (1 pair) * Polythene spacers * Low voltage power supply * Voltmeter * Variable resistance * Light-beam galvanometer * CRO * Standard mass (eg. 100g ) * Connecting leads * Drawing board *
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Christian Hall NT 1310 Physical Networking Lab 3.1 Building a New Structure- Tools and Wiring Structured Cabling Where is the Plenum section of the room and why is it important? The plenum space is where the communication cables for the building ’s computer and telephone network are stored. What is the purpose of Riser cabling? The purpose of riser cabling is so the cables can be situated into walls rather than a drop ceiling. These cables run between floors in non-plenum areas is rated as
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The modern steel plant receives low current‚ high voltage power from the generators of the electrical utility company. The purpose of the steel plant primary transformer is to step-down this voltage. The transformer thus provides high current‚ low voltage power for the EAF furnace. Large furnaces with transformers rated at 100MVA or higher is not uncommon. There are usually two stages to this process. The transformer first steps-down the voltage from high to medium levels. There are different
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Some materials have a feature known as ferromagnetism. The prefix "ferro" refers to Iron‚ which is one such material. Ferromagnetic materials have the ability to "remember" the magnetic fields they have been subjected to. An atom consists of a number of negatively charged electrons‚ orbiting around a positively charged nucleus. These electrons also possess a quantity known as spin‚ which is roughly analogous to a spinning top. The combination of orbital and spin motions is called the angular momentum
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| Two small spheres‚ each with mass m = 3.0 g and charge q‚ are suspended from a point by threads of length L = 0.22 m. What is the charge on each sphere if the threads make an angle = 15º with the vertical? | | A) 0.79 C B) 2.9 C C) 75 mC D) 6.3 C E) 0.11 C | | | | Three charges‚ each of Q = 3.2 10–19 C‚ are arranged at three of the corners of a 20-nm square as shown. The magnitude of the electric field at D‚ the fourth corner of the square‚ is approximately
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Sustainable Energy 1. How can electricity be defined? Electricity can be defined as the flow of electrical power or charge. It is a type of energy fuelled by the flow of electrons from positive and negative points within a conductor. 2. What is an electrical circuit? 3. What components are required to create an electrical circuit? In order to create an electrical circuit‚ you need: a) A source of electric power (battery or generator) b) A load to absorb the power (lamp
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SURVEY QUESTIONAIRE Topic: PERCEPTION OF PREPAID ELECTRIC METERING SYSTEM OF LAOAG CITY RESIDENTS Name: _______________________________________Age: ____ Status: ( ) Single ( ) Married Address: _____________________________________________ Gender: ( ) Male ( ) Female Please answer the following questions: 1. Are you aware about the prepaid electrical metering system? Why? ( ) Yes ( ) No ______________________________________________________________________________________
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Nicole Calhoun Writing Assignment Period 7th September 16‚ 2014 JJ Thomson JJ Thomson’s full name is Joseph John Thomson. Thomson was born on December 18‚ 1856. He was born near Manchester‚ England. Emma Thomson was his mother and she came from a family that owned a company that made produced cotton. Joseph James Thomson was his father and he was a bookseller. Thomson’s father wanted him to become and engineer. He went to his first college at the age of 14. Later‚ he attended Trinity College
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