Question

. In your own words, briefly explain what creates an electric field. I want you to...

. In your own words, briefly explain what creates an electric field. I want you to give a general answer here, not a specific example. 1 sentence is sufficient.

2. In your own words, briefly explain what an electric field does. Again, I am looking for a general answer here, not a specific example. 1 sentence is sufficient.

3. What are the SI units of electric field ?

4. Let E be the magnitude of a certain electric field (not necessarily made by a point charge). Let q be the charge of an object somewhere in that electric field (q is not the charge that is creating the field). In terms of E and q, give a formula for the magnitude of the force made by the electric field E acting on the charge q.

5. Figure 20.25 shows electric field vectors created by a point charge. The black dots represent the locations where each electric field vector is shown. Imagine adding an x-y coordinate system to the figure, with the point charge at the origin. If the length of the electric field vector at a given location is proportional to the magnitude of that vector, how should the length of a vector at position (x=1 m, y=0 m) compare to the length of a vector at position (x=2 m, y=6 m) ? Explain briefly.

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Answer #1

1. Briefly explain what creates an electric field.

Answer: Electric fields are created by electric charges, and by time-varying magnetic fields.

2. Briefly explain what an electric field does.

Answer: An electric field creates a vector field surrounding an electric charge that exerts force on other charges, attracting or repelling them.

3. What are the SI units of electric field ?

Answer: The units of the electric field in the SI system are Newton per coulomb (N/C), or volts per meter (V/m).

4. In terms of E and q, give a formula for the magnitude of the force made by the electric field E acting on the charge q.

Answer: Magnitude of force, F is given by:

F = q*E  

5. Figure 20.25 shows electric field vectors created by a point charge. ……..

Answer: Figure is not provided. Kindly provide the figure!!!

Thanks!!!

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