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Electric Fields of Point Charges and the Velocity of a Released Charge

Explore the relationship between electric fields and the velocity of a released charge in different directions. Determine the net electric field at a point in an equilateral triangle with two point charges.

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Electric Fields of Point Charges and the Velocity of a Released Charge

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  1. Chapter 21 Electric Charge and Electric Fields Part 2

  2. The figure below shows the electric field lines of a single point charge and for two charges of opposite sign and of equal sign. Electric field lines of point charges

  3. Q21.5 A positive point charge +Q is released from rest in an electric field. At any later time, the velocity of the point charge A. is in the direction of the electric field at the position of the point charge. B. is directly opposite the direction of the electric field at the position of the point charge. C. is perpendicular to the direction of the electric field at the position of the point charge. D. is zero. E. is unknown. There is not enough information given to decide.

  4. A21.5 A positive point charge +Q is released from rest in an electric field. At any later time, the velocity of the point charge A. is in the direction of the electric field at the position of the point charge. B. is directly opposite the direction of the electric field at the position of the point charge. C. is perpendicular to the direction of the electric field at the position of the point charge. D. is zero. E. is unknown. There is not enough information given to decide.

  5. Q21.6 Two point charges and a point P lie at the vertices of an equilateral triangle as shown. Both point charges have the same magnitude q but opposite signs. There is nothing at point P. The net electric field that charges #1 and #2 produce at point P is in Charge #1 –q P y +q x Charge #2 A. the +x-direction. B. the –x-direction. C. the +y-direction. D. the –y-direction. E. none of the above

  6. A21.6 Two point charges and a point P lie at the vertices of an equilateral triangle as shown. Both point charges have the same magnitude q but opposite signs. There is nothing at point P. The net electric field that charges #1 and #2 produce at point P is in Charge #1 –q P y +q x Charge #2 A. the +x-direction. B. the –x-direction. C. the +y-direction. D. the –y-direction. E. none of the above

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