EEE 1131: Electrical Circuits
Prepared By : Md. Rezaur Raihan
Assistant Professor
Department of Electrical and Electronic Engineering Khulna University of Engineering & Technology
A.C. Through Resistance and Capacitance
Alternative Method for Power
If the conjugate of current is multiplied by the voltage in Cartesian form, the result is a complex quantity, the real part of which gives the real power j part of which gives the reactive volt-amperes (VAR).
Numerical Problem
Numerical Problem
Numerical Problem
Numerical Problem
It is desired to operate a 100-W, 120-V electric lamp at its current rating from a 240-V, 50-Hz supply. Give details of the simplest manner in which this could be done using (a)a resistor (b)a capacitor and (c) an indicator having resistance of 10 Ω . What power factor would be presented to the supply in each case and which method is the most economical of power.
Rated current of the bulb is = 100/120 = 5/6 A
