CEET(Electronics& electricity) - Coursework Example

CEET (Electronics and electri Q6. An ideal transformer has a primary to secondary turn’s ratio of 20 If 120 V is applied to the primary, and a 100 ohm resistor is connected across the secondary windings, what is the voltage across the resistor, and how much current is flowing through the resistor?SolutionTurn’s ratio is 20:1Primary voltage =120 V Resistance in the secondary coil=100ΩSince it is an ideal transformer, its efficiency=100%In this scenario, the problem can be solved by applying the equation;The current flowing through the resistor will be thus; Q7.

Calculate the value of an equivalent inductor that can be used to replace the three parallel inductors shown.SolutionThe above arrangement shows inductors in parallel. The effective inductance in this arrangement is calculated differently. Thus, if a potential difference was to be applied across these inductors and a current made to flow, the total current flowing in the circuit would be obtained using Kirchhoff’s law of current as follows; The equation finally reduces to;Q8. Calculate the value of an equivalent inductor that can be used to replace the three series inductors shown.

SolutionSince this is a series arrangement with a missing mutual inductance or magnetic coupling, the effective inductance can simply be calculated by adding up the individual inductance. Since this is the case, then following formula appliesA single inductor that can replace the three should have an inductance equivalent toWork citedHurley, William G, and Werner H. Wolfe. Transformers and Inductors for Power Electronics: Theory, Design and Applications. , 2013. Print.