Question

Is the magnitude of the electric field you calculated in part A larger or smaller than the electric field 20.0 cm from a point charge that has the same total charge as this disk? In terms of the approximation used in part B to derive E=Q/4πP0x2 for a point charge from equation Ex=σ2ϵ0[1−1(R2/x2+1)√], explain why this is so.

Part D Constants A uniformly charged disk has radius 2.50 cm and carries a total charge of 2.0x10-12 C.(Figure 1) s the magnitude of the electric field you calculated in part A larger or smaller than the electric field 20.0 cm from a point charge that has the same total charge as this disk? In terms of the approximation used in part B to derive EQ/4T Poa2 for a point charge from equation E,- 1 explain why this is so 260 Figure 1 of 1 Essay answers are limited to about 500 words (3800 characters maximum, including spaces) 3800 Character(s) remaining do Submit Request Answer

This essay question confuses me and any help with an explanation would be very appreciated.

Thank you.

Answer 1

electricfield due to point charge is slightly higher than electric field due to disk at a distance 20.0cm but approximately equal if radius of disk R is small than the distance x on its axis from center