Answer:
Explanation:
D, when electrons are not free to move.. the material is a good insulator
D. Electrons are tightly bound to the nuclei.
In an insulator, the electrons of the outer most shell are bound with a very high electrostatic forces coming from the nucleus of each atom so electrons cannot flow around all atoms making up the material as in a conductor.
I would say the answer is the wave of 21.000Hz
Because it has more frequency, and as more frequency you add, the time or longer period also increases.
the amount of charge stored per volt
