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Home Q & A Board Science-Related Homework Help Physics
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princess001 princess001
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11 years ago
1. Why cannot St Elmo's fire be observed in the interior of a conductor?

2. By considering the electric forces acting and Newton's second law, explain the type of motion occurring in a uniform electric field. 

3. By considering the electric forces acting and Newton's second law, explain the type of motion occurring in a non-uniform electric field.

4. In which direction must a test charge be moved within an electric field if potential energy is to be stored in the system? Explain. (consider both + and - charges)


THANK YOU Slight Smile PLEASE HELP!
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#1
11 years ago
Quote from: princess001 (11 years ago)
2. By considering the electric forces acting and Newton's second law, explain the type of motion occurring in a uniform electric field.

Newtons second law states that the acceleration of an object depends upon the force acting on it and the objects mass. If an electron got accelerated through a uniform electric field then the electron would follow a parabolic path which is the motion of the electron. Electric force = V/d, if a larger object got accelerated through a uniform electric field then the motion of the object would be slower, however the greater the force of the electric field the faster the object would be accelerated through the field.
princess001 Author
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#2
11 years ago
Thank you
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#3
11 years ago
Glad I could help.

Quote
4. In which direction must a test charge be moved within an electric field if potential energy is to be stored in the system? Explain. (consider both + and - charges)

You must do positive work on the system for the system to gain potential. In the case of electric field, that means moving against the field direction (for a positive charge at least).

You can think of it in an analogous gravity sense. The gravitation field is directed towards the center of mass, AKA down. To increase GPE, you must move up, i.e. against the field direction.

Be sure though to watch whether the test charge is positive or negative because that WILL change your answer.
princess001 Author
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#4
11 years ago
I need help on the other two please help
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