physics

posted by .

four particles with charges +5x10^-6C, +3x10^-6, +3x10^-6C, and +5x10^-6C are placed at the corners of a 2m x 2m square. (a)determine the electric potential at the center of the square, assuming zero potential at infinity. (answer:3.83x10^4V)(b) If one of the +3x10^-6C charges is replaced by a -4x10^-6C charge, what is the electric potential at the square's center? (answer: -6.36x10^3 V) Any help is appreciated.

  • physics -

    To get the potential energy at any point P, add up the k*Qi/ri terms, where Qi is the charge of the ith particle and ri is it's distance away from point P. The sign of Q is important.

    At the center, ri = sqrt2 meters for each corner particle

    Do both problems the same way, but changing the value of one of the charges, qi. The other three charges stay the same.

  • physics (for drwls) -

    there is a typo. the last charge is suppose to be -5c10^-6C

    Can you check my work and see what I did wrong? Thank you!

    Work:
    K(5x10^-6C)/1 + K(3x10^-6)/1 + K(3x10^-6)/1+ K(-5x10^-6C)/1+K(5x10^-6C)/sqrt(2) + K(3x10^-6)/sqrt(2) + K(3x10^-6)/sqrt(2)+ K(-5x10^-6C)/sqrt(2)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Hi, i need help on the following questions. Thank you. 1) The potential at location A is 441 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 805 …
  2. physics

    Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square?
  3. college physics,electric potential

    Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square?
  4. Physics 112

    Three point charges with values = 4.00 , = 1.00 , and = 7.00 are placed on three consecutive corners of a square whose side measures = 5.00 . Point A lies at the fourth corner of the square, diagonally across from . Point B lies at …
  5. Physics/ electricity

    Consider a square of side length a = 9.7 cm with charged particles at each of the corners. Three of the particles carry +9.3 nC of charge while the fourth particle carries -9.3 nC. In volts, what is the electric potential at the center …
  6. physics

    Consider a square of side length a = 9.4 cm with charged particles at each of the corners.Three of the particles carry +9 nC of charge while the fourth particle carries -9 nC.In volts, what is the electric potential at the center of …
  7. Physics

    A capacitor has a charge of 5 µC when charged by a potential difference of 1.5 V. What is the capacitance of the capacitor?
  8. Physics

    Point charges Q1 ,Q2 , and Q3 reside on three corners of a square with sides of 1m ; the distance from Q2 to P3 is 2m (see diagram). (a) What is the electric potential,V , at P1 ?
  9. Physics

    Four equal +6.00-μC point charges are placed at the corners of a square 2.00 m on each side. ( = 1/4π = 8.99 × 109 N · m2/C2) (a) What is the electric potential (relative to infinity) due to these charges at the center …
  10. physics

    Four identical point charges (+2.51 nC) are placed at the corners of a rectangle, which measures 4.00 m by 7.00 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this rectangle?

More Similar Questions