Investigation Calvin Chang 8.2 Stage 1: Planning the Experiment Introduction ! By “electric current”‚ I mean by the rate at which electric charges moves through a circuit‚ the electric charges can either be ions or electrons. They are measured in ammeters and the unit that is measured in is ampere which is the number of charges that passes through per second. There are many factors which would affect the electric current‚ like the voltage of the battery‚ the type of wire you are using‚ how long the circuit
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of an object by the electric field of another object. >> is the transfer of electrons from a charged object to another object by direct contact. 1. Positive charge (+) – “a deficiency of electrons”. 2. Negative charge (-) – “ a surplus of electrons”. The field lines are originated from the positive charge. The field lines end up at the negative charge. >> The region where an electric force acts on a charged body. Positive charge electric field Negative charge electric field A positive charge
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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. It is denoted by the letter
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(solids) ● 3 factors that conduct better: 1) larger area 2) thickness-slows heat from inside to outside 3) material ●good conductor of heat: metals ●bad conductor of heat: air ●convention- the transfer of heat energy in a gas or liquid by means of currents in the heated fluid... fluids move carring energy with it (actual movement from one location to another) ●hot air rises(less dense than cool air) ●radiation- the transfer of energy through by
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dystopian civilizations‚ there are common themes of advances in technology‚ fight for control and loss of humanity. These themes are reflective of the angst in the postmodern American society and can be seen in novels such as Do Androids Dream of Electric Sheep? by Philip Dick. The parallel between this work and trends in society are
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denoted by R(E). 9. Direct Current Such a current that does not change its direction is known as direct current. It is denoted by DC‚ which is obtained from primary and secondary cells. 10. Alternating Current Such a current that reverses its direction with a constant frequency from positive to negative and negative to positive direction is known as Alternating Current‚ obtained by generators. It is denoted by AC. 11. Conventional Current An electric current considered to flow from points
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associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects‚ such as lightning‚ static electricity‚ electromagnetic induction and the flow of electrical current. In addition‚ electricity permits the creation and reception of electromagnetic radiation such as radio waves. In electricity‚ charges produce electromagnetic fields which act on other charges. Electricity occurs because of the following‚ an electric charge‚ that is a property of some subatomic
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Electricity is important in our everyday lives. It is essential for almost everything in our modern world. The knowledge learned in the past about electricity enabled such things as engines‚ telephones‚ radios‚ computers‚ and much‚ much more. As early as 600 B.C.‚ the Greeks were already studying electricity. They noticed that if you rubbed a piece of amber with fur‚ it had a charge with the ability to attract small objects. Many years later‚ in the 16th Century‚ William Gilbert discovered many
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SAFETY PRECAUTIONS IN USING ELECTRICITY:- 1. Avoid water at all times when working with electricity. Never touch or try repairing any electrical equipment or circuits with wet hands. It increases the conductivity of electric current. 2. Never use equipment with frayed cords‚ damaged insulation or broken plugs. 3. If you are working on any receptacle at your home then always turn off the mains. It is also a good idea to put up a sign on the service panel so that nobody turns the main switch ON
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Submitted By A Minor Project Report On “DIGITAL SOIL MOISTURE TEST” In partial fulfillment of requirements for the degree of Bachelor of Technology In Electrical Engineering Guided by Prof. VINEET MEHTA Name of the student: BHOMARAM BHISNOI (10EJIEEOO6) JAGDEV(10EJIEE022) DEPARTMENT
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