Answer:
Lightning
Explanation:
Air is a non-conductor of electricity because it does not have free electrons to carry the current. But when there is a high voltage, as in the case of lightning, the molecules of air get ionized and electrons are available to flow to make the current and conduct electricity through the air.
Answer:
Check the explanation
Explanation:
(a) When the electric field is applied to the ends of the wire, electrons move through the wire because the resistance of the wire is less than the resistance of the surrounding air. Resistance is the obstruction to the flow of electrons hence electrons flow through the path having minimum resistance.
(b) As the thermal energy increases, Kinetic energy of electrons as well as that of positive ions also increase. Hence the mean time between collisions of electrons with ions is reduced due to movement of ions also. That is why Resistance of the wire increases.
Answer:
A. Because protons are positively charged and like charges repel
Explanation:
In the nucleus of an atom are subatomic particles as follows: proton and neutron. Protons are positively charged subatomic particles while neutrons are neutrally charged. Following the principle that "like charges repel one another", protons in the nucleus of an atom tend to repel one another.
Hence, the need for neutrons to form a strong force with the self-repelling protons. This bonding between the neutrons and protons help keep the nucleus together. Therefore, protons wouldn’t be able to handle being packed into the nucleus without neutrons because protons are positively charged and like charges repel.