How can the resistor be charged?

Resistors cannot be charged in the same way capacitors can, as they do not store electrical energy. Instead, resistors dissipate electrical energy as heat when current flows through them, based on Ohm's Law. When a voltage is applied across a resistor, it allows current to pass, and the resistor converts electrical energy into thermal energy according to its resistance value. Thus, while resistors are integral to circuits, they don't store charge.