what are the mechanical efficiency of the steam turbine, electrical efficiency of the generator and overall efficiency of the thermal powerplant if the electric generator produces electricity at 410 kilovolts and 170 kiloamperes

representative si the final answer! : )

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.