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- 2. 19EC1154 Basics of Electron Devicesand Electric Circuits
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- 5. UNIT I :ELECTRICAL CIRCUITS AND ANALYSIS Ohm‘s law, DC and AC circuits fundamentals, Kirchhoff‘s laws, Mesh and Nodal analysis-Theorems and simple problems: Superposition, Maximum power transfer theorem - Experimental study -Verification of superposition theorem.
- 6. UNIT II :CIRCUIT TRANSIENTS AND RESONANCES Basic RL, RC and RLC circuits and their responses to DC and sinusoidal inputs –frequency response – Parallel and series resonances – Q factor. Experimental verification of series resonance. Experimental study- Determination of Resonance Frequency of Series RLC Circuits
- 7. UNIT III :DIODE AND TRANSISTOR Characteristics of PN Junction Diode – Zener Diode and its Characteristics – Zener Effect– Zener Voltage Regulator.Bipolar Junction Transistor (BJT) Construction – CB, CE, CC Configurations and Characteristics- Experimental study-PN Junction Diode Characteristics,Zener Diode Characteristics
- 8. UNIT IV :SPECIAL SEMICONDUCTOR DEVICES Construction, Characteristics and Applications of FET - UJT – SCR, Photo diode, Photo Transistor - LED and LCD- Implementation of Photo diode application. Experimental study- FET Characteristics
- 9. UNIT V :BASICS OF POWER SUPPLY AND ELECTRICAL WIRING Introduction to Power supply circuits: Half wave, Full wave Rectifier –SMPS - UPS (online & offline).Cable and wire types and applications – Two way and three way control- Experimental study - Implementation of simple wiring circuit for a Computer network
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- 12. VOLTAGE Voltage, alsocalled electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field. The greater the voltage, the greater the flow of electrical current (that is, the quantity of charge carriers that pass a fixed point per unit of time) through a conducting or semiconducting medium for a given resistance to the flow. Voltage is symbolized by an uppercase italic letter V or E. The standard unit is the volt, symbolized by a non-italic uppercase letter V. One volt will drive one coulomb (6.24 x 1018) charge carriers, such as electrons, through a resistance of one ohm in one second.
- 13. TYPE THE STANDARDVALUE OF VOLTAGE FOR SINGLE PHASE AC SUPPLY WE ARE GETTING FOR OUR HOME FROM ELECTRICITY BOARD IN CHAT BOX NOW ?????
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- 16. CURRENT The electriccurrent is the rate of flow of electric charge through a conducting medium with respect to time. When there is a potential difference between two points in a conductive medium, electric charge starts flowing from the higher potential point to the lower potential point to balance the charge distribution between the points. The rate of flow of charge in respect of time is known as electric current. If q Coulomb electric charge gets transferred between these two points in time t sec, then the current can be calculated as q/t
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- 18. RESISTANCE Resistance (alsoknown as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). When a voltage is applied across a substance there will be an electric current through it. The applied voltage across the substance is directly proportional to the current through it. The constant of proportionality is resistance. Hence resistance is defined as the ratio of the applied voltage to the current through the substance.Where V is voltage, I is current and R is resistance.
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- 21. STILL U CAN’T..?LOOK THIS…
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- 24. OHM’S LAW Thefirst, and perhaps most important, the relationship between current, voltage, and resistance is called Ohm’s Law, discovered by Georg Simon Ohm and published in his 1827 paper. Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperature remain constant.
- 25. PROBLEM-1 Determine thecurrent resulting from the application of a 9-V battery across a network with a resistance of 2.2 .
- 26. PROBLEM-2 Calculate the resistanceof a 60-W bulb if a current of 500 mA results from an applied voltage of 120 V.
- 27. PROBLEM-3 Calculate the currentthrough the 2-k resistor of Fig. if the voltage drop across it is 16 V.
- 28. PROBLEM-4 (DO ITBY YOURSELF) Calculate the voltage that must be applied across the soldering iron of Fig. to establish a current of 1.5 A through the iron if its internal resistance is 80 .
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- 30. The limitations ofOhm’s law This law cannot be applied to unilateral networks. A unilateral network has unilateral elements like diode transistors, etc., which do not have same voltage current relation for both directions of current. Ohm’s law is also not applicable for non – linear elements. Non-linear elements are those which do not have current exactly proportional to the applied voltage, that means the resistance value of those elements changes for different values of voltage and current. Examples of non – linear elements are thyristor, electric arc, etc.
- 31. KIRCHHOFF’S VOLTAGE LAW For any closed path in a network, Kirchhoff’s voltage law (KVL) states that the algebraic sum of the voltages is zero. Some of the voltages will be sources, while others will result from current in passive elements creating a voltage, which is sometimes referred to as a voltage drop.
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- 36. KIRCHHOFF’S CURRENT LAW The connection of two or more circuit elements creates a junction called a node. The junction between two elements is called a simple node and no division of current results. The junction of three or more elements is called a principal node, and here current division does take place. Kirchhoff’s current law (KCL) states that the algebraic sum of the currents at a node is zero.
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- 40. Determine the currentflowing through this circuit
- 46. IMPORTANT FORMULAS V=IR AC POWER = VIcosф DC POWER = VI or IR*I
- 47. PROBLEM-10 For the circuitin Fig. 2.21(a), find voltages v1 and v2.
- 49. Problem-11 (class workout) Find V1 and V2 in the circuit.