Copper loss Transformer windings have electrical resistance. When an electric current flows through them, some amount of energy is dissipated due to Joule heating. This energy loss is called copper loss which is minimized by using wires of larger diameter. iii) Flux leakage Flux leakage happens when the magnetic lines of primary coil are not completely linked with secondary coil.
Energy loss due to this flux leakage is minimized by winding coils one over the other. . . Advantages of AC in long distance power transmission Electric power is produced in a large scale at electric power stations with the help of AC generators.
These power stations are classified based on the type of fuel used as thermal, hydro electric and nuclear power stations. Most of these stations are located at remote places. Hence the electric power generated is transmitted over long distances through transmission lines to reach towns or cities where it is actually consumed. This process is called power transmission .
But there is a difficulty during power transmission. A sizable fraction of electric 12th - 12th - - - - - Unit ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT EXAMPLE . An ideal transformer has and , turns in the primary and secondary coils respectively. Find the voltage developed per turn of the secondary if the transformer is connected to a V AC mains.
The secondary is given to a load of resistance Ω. Calculate the power delivered to the load. Solution N P = turns; N S = , turns V P = V; R S = Ω (i) Secondary voltage, V N , = , Secondary voltage per turn, V = , , = . V (ii) Power delivered = V I , , = kW EXAMPLE .
An inverter is common electrical device which we use in our homes. When there is no power in our house, inverter gives AC power to run a