INTRODUCTION Electricity is one of the basic needs of every individual especially in this “digital” era wherein technology has taken place. It is important in houses‚ streets‚ mini-stores up to big companies. With it‚ we enjoy lighting for our home‚ and heat and cooling to keep ourselves comfortable‚ and access to the countless appliances that make our lives better. By powering television and computers‚ it keeps us in touch with the outside world‚ and by powering alarms and security systems‚ it
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A force can do one of four things to an object: 1. Make it speed up - accelerate. 2. Make it slow down - decelerate. 3. Change its direction. 4. Change its shape. If something is doing one of these four things there must be net force acting upon it. Newton’s First Law ’Every body continues in a state of rest or uniform motion unless acted upon by an external force.’ Something without net force acting on it will either stay still or move at a constant speed in a straight line until
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known the means of holding hands together then pushing the button that take part as the sign that the electricity will flow. As the two persons standing beside that equipment push the button‚ those persons including other people who hold their hand will be grounded. The reason why this scenario happens‚ since human is a conductor of electricity‚ then if they hold hands together‚ the electricity will flow through them. That equipment is my favorite among all devices I saw in the exhibit. Another
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Nikola Tesla was the most underappreciated scientist of all time. In spite of his lack of funding‚ trust‚ and support; Tesla was one of the most successful inventors that the world has ever seen. From AC generators to wireless transmission of electricity to invisible death rays; Tesla envisioned countless world changing inventions. With proper funding and support‚ we can only speculate how many more theories he would have successfully tested. The Amazing Nikola Tesla Technology has exponentially
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Neeru2012-10-23T12:15:00 CLASS 10 ELECTRICITY 1. How much current will an electric heater coil draw from a 220 volt line‚ if the resistance of the heater coil is 40? (1 Mark) (Ans) Given‚ R= 40‚ V=220 V We have the relation‚ I = V/R = 220/40 = 5.5 A 2. What is electric current? (1 Mark) (Ans) The rate of flow of charge per unit time through a conductor is called electric current. 3. What is the SI unit of electric current? (1 Mark) (Ans) The SI unit of electric current is ampere
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through a conductor of resistance R (Ω) for a given time t. [1] Although electric resistance heating converts nearly 100% of the electricity to heat‚ the overall process is still inefficient since the electricity is usually produced from oil‚ gas‚ or coal generators that convert only about 30% of the fuel’s energy into electricity. [2] Due to the energy loss in electricity generation and transmission‚ electric resistance heating is often more expensive than heat produced using combustion appliances
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who haven’t put much effort into chancing their business greener and cleaner. Firstly‚ one major threat to Estonian environment is oil shale mines and power plant in Ida-Virumaa. It has been the main source of electricity in Estonia for a long time‚ maybe even too long. Making electricity from oil shale is not only expensive‚ it is also very polluting and mining is ruining soil and ground water. Nowadays there are much more efficient alternatives to producing electric energy. The company who owns
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attached to spindle to which rotating disc is attached. Many times it becomes necessary to find out the energy consumption consumed by our house appliances we use. The project “ADVANCED ENERGY METER” prepared by us can be used to find out how much electricity appliances in our house are using and how much they cost to run. INTRODUCTION If we want to save power and reduce costs‚ we need to know how much power each appliance uses over a period of time. Most appliances don’t run all the time‚ so we need
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Who had the greatest impact on our technology? It was none other than Nikola Tesla. Tesla invented alternating current‚ wireless telegraphy‚ the radio etc. Many of which Tesla invented at the 1893 Chicago World`s Fair. Before Tesla began inventing his parents believed he would do something great. Born July 10‚ 1856 in Smiljan‚ Croatia‚ Tesla was said to be “a child of the light.” Early in his life he was exposed to inventing. In school he always had perfect grades and an overachiever. He believed
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000 Mar 28th: Returned goods worth Rs 2‚000 to Rahul. April 15th: Raj returned goods worth Rs 3‚000. May 8th: Paid salary to staff Rs 4‚000. May 22nd: Paid Rs 18‚000 to Rahul on account; 6‚000 by cash and 12‚000 by cheque June 11th: Paid electricity charges Rs 7‚000. June 25th: Received Rs 27‚000 from Raj on account; 15000 by cash and 12‚000 by cheque. July 2nd: Withdrew Rs 10‚000 cash for Samya’s personal use July 18th: Purchased goods worth Rs 30‚000 on credit from John. Aug 10th:
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