**Closed Electrical Circuit**

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Which type of circuit offers only one path for current flow? a. series b. parallel c. seriesparallel d. open 18. A break in a circuit that causes a loss of continuity is called a: a. short b. ground c. open d. overload 19. Which of the following would cause high resistance in a closed electrical circuit? a. short to ground b. corroded terminals c. broken wire d. heavy gauge electrical wiring 20. If one branch of a parallel circuit has high resistance, how will total circuit current be affected? a. Current 1.15.2 Kirchhoffs Voltage Law (KVL) "In any network, the algebraic sum of the voltage drops across the circuit elements of any closed path (or loop or mesh) is equal to the algebraic sum of the e.m.f. s in the path " In other.words, "The algebraic sum of all the branch voltages, around any closed path or closed loop is always zero." Around a closed path X V= 0 The law states that if one starts at a R R certain point of a closed path and goes on Ac VWV OB Ao VWV °B tracing and noting all Kirchhoff's current law is true because electric current is merely the flow of free electrons and they cannot accumulate at any point in the circuit. This is in accordance with the law of conservation of charge. Hence, Kirchhoff's current law is based on the law of conservation of charge. (ii) Kirchhoff's Voltage Law (KVL). This law relates to e.m.f.s and voltage drops in a closed circuit or loop and may be stated as under : In any closed electrical.circuit or mesh, the algebraic sum of all the sistance in the closed circuit, signaling means on the rolling equipment, and means for including said signaling means in the local circuit at one end of the block. [Claims 6 to 10 not printed in the Gazette.] 1, 06 0, 399. ELECTRICAL TRAIN CONTROLLING MEANS. ANDREw J. ALLARD, Richmond, Va., assignor of onethird to T. F. Green and onethird to D. R. Creecy, Jr., Richmond, Va. Original application filed Oct. 4, 1910, Serial No. 585,295. Divided and this application filed Feb.Kirchhoff's current law is true because electric current is merely the flow of free electrons and they cannot accumulate at any point in the circuit. This is in accordance with the law of conservation of charge..Hence, Kirchhoff's current law is based on the law of conservation of charge. 2. Kirchhoff's Voltage Law (KVL) or Kirchhoff's Loop Rule. This law is based on the conservation of energy and may be stated as under : In any closed electrical circuit or loop, the algebraic sum of all the Chapter 4 Complete Equivalence As we saw in Section 1.7, when we calculate the mutual inductance between separate closed circuits we obtain the same value with the formulas of Neumann, Weber, Maxwell and Graneau. This is valid only for closed circuits. In Sections 3.1.1 and 3.1.2 we saw that the mutual inductance between two finite filiform wires depend on k, the same happening with the mutual inductance between two strips of finite width,.as we saw in Section 3.2.2.Once all such polarities are marked in the given circuit, we can apply KVL to any closed path in the circuit. Now while tracing a closed path, if we go from ve marked terminal to + ve marked terminal, that voltage must be taken as positive. This is called potential rise. For example, if the branch AB is traced from A to B then the drop across it must be considered as rise and must be taken as + IR while writing the equations. While tracing a closed path, if we go from +ve marked terminal to Study the electric circuits shown below. In circuit A, the battery is connected to the metal casing of the bulb. In circuit B, the battery is connected to the metal tip of the bulb. Are they closed or open circuits?.Will the bulbs light up? Circuit A Circuit B Gap Gap Both circuits are open because there are gaps in the circuits. Therefore, the bulbs will not light up. To close the circuit, one end of the battery must be connected to the metal casing of the bulb and the other end to the metal tip of the 7.4.1. Kirchhoff's. Voltage. Law. Kirchhoff's Voltage Law is a form of the Conservation of Energy Law, and can be stated as: The algebraic sum of the voltage drops in a closed electrical circuit is equal to the algebraic sum of the voltage sources (i.e., increases) in the circuit. Mathematically, Kirchhoff's Voltage Law is written as: where Makes a simple game that uses a closed electrical circuit. Materials. • For each.group of students: shoebox; electrical tape; 15cm length of flexible bare wire; 80cm length of flexible bare wire; 3cm length of insulated wire with both ends bared; 50cm length of insulated wire with both ends bared; wire clippers; pen; 1.5 volt light bulb in a socket; scissors; AA battery • A small buzzer could be substituted for the light bulb in this activity; however, bulbs are more readily available (Note: