Carefully study the following plot of electric field E in N/C versus distance r
ID: 2118824 • Letter: C
Question
Carefully study the following plot of electric field E in N/C versus distance r in m and answer the questions that follow. The electric field is directed radially outward, and the variation of E with r is independent of direction.
For each statement, select "True" or "False".
1.All points at a given distance 'd' from the origin are at the same electrostatic potential.
2.The force on a charge placed at A has a tangential component.
3.The electric potential is constant for r less than R.
4.The work done by you to bring a point negative charge from infinity to A (it starts and finishes at rest) is negative.
5.The above electric field could be that due to a positively charged spherical shell.
6.The Electric field falls off as 1/r for r greater than R.
Explanation / Answer
1. True. The potential at a distance d is only dependant on distance not on the angle.
2. False. Since it is equipotential at a distance d the tangential conponent is zero.
3. True. from less than R its actually zero.
4. True
5. True, it must be a conducting shell.
6. False. it falls off as 1/r^2