physics

please,i need help on this question:a thin circular ring of radius 20cm is charged with a uniform charge density(rho),if a small section of 1cm length is removed from the ring.calculate the electric field intensity at the center of the ring

  1. 👍 0
  2. 👎 0
  3. 👁 115
asked by culata
  1. At the center of the ring, the charge would be zero at the center before the 1 cm segment is removed, due to symmetry considerations. Use a principle of superposition. The ring with a segment removed is the same as a complete ring (zero field) minus a 1 cm segment of the opposite charge. The latter can be approximated as the field of a point charge or, with better accuracy, as a straight line segment. You want the field 20 cm away, normal to the line.

    1. 👍 0
    2. 👎 0
    posted by drwls
  2. Atthe centre of the ring the electric field is zero.because the ring is considered as a point,which cannot experience its own field except by an external body

    1. 👍 0
    2. 👎 0
    posted by jim

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    Two 10-cm-diameter charged rings face each other, 20cm apart. The left ring is charged to -22nC and the right ring is charged to +22nC . What is the magnitude of the electric field E⃗ at the midpoint between the two rings?

    asked by Jenny on September 1, 2014
  2. Physics E&M

    An electron is released from rest on the axis of a uniform positively charged ring, 0.100 m from the ring's center. If the linear charge density of the ring is +0.149 µC/m and the radius of the ring is 0.200 m, how fast will the

    asked by Alex on January 24, 2010
  3. Physics

    Consider a ring of radius a containing q amount of negative charges. Derive an expression for the electric field strength at a point at a distance x on the axis of this charged ring. Hence prove that at a great enough distances,

    asked by Ashik on August 11, 2011
  4. physics

    a metallic ring of radius 'r' and cross sectional area is fitted into an wooden circular disc of radius R (R greater than r).If he young's modulus of the material of the ring is Y, the fore with which the metal ring expands is :

    asked by kala on February 4, 2013
  5. math

    A two dimensional picture of a circular onion ring is shown at the right. The inner radius of the onion ring is x cm. and the thickness of the ring is 1 cm. Which of the numbered choices represents the area, in square centimeters,

    asked by Anonymous on December 23, 2013
  6. math

    A two dimensional picture of a circular onion ring is shown at the right. The inner radius of the onion ring is x cm. and the thickness of the ring is 1 cm. Which of the numbered choices represents the area, in square centimeters,

    asked by Anonymous on December 23, 2013
  7. Physics

    A flat thin non-conducting ring has an inner radius R1 and an outer radius R2 . The disk is uniformly charged with charge per unit area σ(>0) . (a) What is the electric field at the center, P, of the ring? Express your answer in

    asked by Anonymous on February 21, 2013
  8. physics

    A circular disk of 10cm radius is charged uniformly with a total charge of Q. Find the electric field intensity at a point 20cm away from the disk along its axis

    asked by Anonymous on November 14, 2015
  9. Physivs

    A flat thin non-conducting ring has an inner radius and an outer radius . The disk is uniformly charged with charge per unit area . (a) What is the electric field at the center, , of the ring? Express your answer in terms of the

    asked by P on February 24, 2013
  10. physics

    A thin ring of radius equal to 25 cm carries a uniformly distributed charge of 4.7 nC. What is the electric field and potential difference at the center of the ring?

    asked by sandhu on September 19, 2009

More Similar Questions