SYLLABUS FOR EEE>>>
*IN SERIES A.C CIRCUIT CHAPTER-topics from series R-L-C circuit till the end of chapter.
*PARALLEL AND SERIES-PARALLEL A.C CIRCUITS CHAPTER.
*IN THREE PHASE SYSTEM CHAPTER- till the topics covered in the class.
*CAPACITANCE CHAPTER.
*.ELECTROSTATICS
*ELECTROMAGNETICS.
In charging and discharging of capacitor why does the graph of V->I comes in fourth qudarant?
The graph of i-t in discharging of capaciter is in the 4th quadrant because the equation is i=-Imax.e^(-t/RC). Thus the discharging current decreases exponentially.The negative sign indicates that the discharge current flows in the opposite direction to that of charging current.
Rest in all other cases i.e is v-t graph in discharging and i-t,v-t graph in charging the graph is in the 1st quadrant as there exist no negative sign in the equation.
In india supply voltage is 230volts and in us it is 110 volts then how india’s electrical equipments are used over there?
Power Transformer helps in doing so………. The purpose of a power transformer is to convert AC supply voltage to one or more different AC voltages. In most cases it also provides electrical insulation between the supply voltage and the user’s equipment.
The secondary windings of the transformer provide the voltages and currents required by the user to power lamps or motors, or to supply rectifiers. The Rated Power of the transformer is the sum of the VA (Volts x Amps) for all of the secondary windings.
The primary winding of a transformer must be designed to match the voltage and the frequency from the power source to the transformer, and must be able to transfer the necessary VA to the secondaries without overheating. The current carried by the primary winding thus depends on the secondary VA, but the voltage depends only on the power source.
A secondary winding is needed for voltage conversion in transformer.
