Question

5. Determine the electric field E (vector) at the origin O in the figure below due to the two charges at A and B. +26 ?C 8.0 cm -26 ?C 8.0 cm 6. If a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a positive charge? How does the potential energy of the charge change in each instance? Explain. 7. How much work does the electric field do in moving from a point at a potential of +125 V to a point at -45 V? Express your answer in both joules and electron volts. 8. What is the speed of a proton whose KE is 4.3 keV? 9. What is the electric potential 15.0 cm from a 3 ?C point charge? 10. What is the capacitance of a pair of circular plates with a radius of 5 cm separated by 2.8 mm of mica?

          5. Determine the electric field E (vector) at the origin O in the figure below due to the two charges at A and B.

+26 ?C      8.0 cm      -26 ?C

8.0 cm

6. If a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a positive charge? How does the potential energy of the charge change in each instance? Explain.

7. How much work does the electric field do in moving from a point at a potential of +125 V to a point at -45 V? Express your answer in both joules and electron volts.

8. What is the speed of a proton whose KE is 4.3 keV?

9. What is the electric potential 15.0 cm from a 3 ?C point charge?

10. What is the capacitance of a pair of circular plates with a radius of 5 cm separated by 2.8 mm of mica?

5. Determine the electric field E (vector) at the origin O in the figure below due to the two charges at A and B.

+26 ?C 8.0 cm -26 ?C

8.0 cm

6. If a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a positive charge? How does the potential energy of the charge change in each instance? Explain.

7. How much work does the electric field do in moving from a point at a potential of +125 V to a point at -45 V? Express your answer in both joules and electron volts.

8. What is the speed of a proton whose KE is 4.3 keV?

9. What is the electric potential 15.0 cm from a 3 ?C point charge?

10. What is the capacitance of a pair of circular plates with a radius of 5 cm separated by 2.8 mm of mica?

Added by Ricardo G.

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