Answer:
Option d.
Explanation:
The asteroid belt is a stellar disc which exists in between Mars and Jupiter's orbits which consists of a large no. of asteroids in our solar system.
the asteroids in the asteroid belt are formed from different regions and those asteroids with the similar chemical properties or compositions form a group and the different groups formed on these basis are distant from each other with some gap called as kirkwood gap. The gaps so formed are in resonance with Jupiter and are influenced by the strong gravitational force of Jupiter which renders them unstable in the region of resonance which prevents planet formation.
In the field meana you are partacing in data collection or experimentation in a live natural environment, and in the lab means that your environment is controlled.
While self-gravity pulls the star inward and tries to make it collapse, thermal pressure (heat created by fusion) pushes outward. These two forces cancel each other out in a main sequence star, thus making it stable.
Answer:
it is essential that the charge on the plates are of the same magnitude, but in the opposite direction
Explanation:
The configuration of parallel plates is called a capacitor and is widely used to create constant electric fields inside.
To obtain this field it is essential that the charge on the plates are of the same magnitude, but in the opposite direction
This is so that the fields created by each plate can be added inside and subtracted from the outside of the plates
