Electric motor is an indispensable element of industrial development and plays an important role. Th

In general power transformers, the winding resistance voltage drop is very small and can be ignored,

As an example of the magnetic field acting on the current-carrying conductor, put two current-carryi

Definition: In a uniform magnetic field, the product of magnetic induction intensity B and a certain

When the load voltage does not exceed the electromotive force of a voltage source and the load curre

The greater the resistance of a conductor, the worse its conductivity. On the contrary, the smaller