IDNStudy.com, kung saan ang iyong mga tanong ay natutugunan ng eksaktong sagot. Ang aming komunidad ay narito upang magbigay ng detalyadong sagot sa lahat ng iyong mga katanungan.
Explanation:
Adding more turns will increase the electrical resistance of the winding, possibly reducing the current flowing through the winding if it is driven from a constant voltage source. However, the strength of an electromagnet is proportional to the number of turns times the current flowing through the winding (“ampere-turns”) until the core (if present) begins to saturate. So, adding more turns usually has the effect of increasing the strength off the associated magnetic.
If the electromagnet is powered from an AC source, adding more turns increases the inductance (which scales as turns-squared). In this case the added inductance increases the coil’s AC resistance (inductive impedance). This reduces the current so that the resulting ampere-turns (and associated magnetic field) becomes less than a coil with fewer turns.