The energy required to find the effective value then simultaneously generates the current required for the same energy, and the sine effective value is the maximum value/root number 2.
The free charge in metal conductor is free electron, and it is positive ion and negative ion in the aqueous solution of acid, alkali and salt. The current flows from the positive electrode to the negative electrode outside the power supply and from the negative electrode to the positive electrode inside the power supply.
Extended data:
The direction of current is the same as that of positive charge moving in the circuit. In daily circuits, it is not the movement of positive charges, but the movement of negative charges. Free electrons in metals are negatively charged and move in the opposite direction to the current in the circuit.
Two parts b and c are selected on the conductor AD with uniform thickness to which the voltage is applied. Suppose that the cross-sectional area of the conductor is S, the number of free charges per unit volume of the conductor is N, the charge amount of each charge is E, and the direction movement rate of the charge is V, then all free charges between two intervals B and C with a distance of vt will pass through interval C in time T. ..