Constants This problem checks that you can use the formula that gives the electr
ID: 1573187 • Letter: C
Question
Constants This problem checks that you can use the formula that gives the electric field due to a spherical shell of charge. This formula can be calculated using the superposition principle we discussed in class and r outside the shell and zero inside the shell. The distance is the distance between the center of the shell and the point of interest. Part A Consider a sphere with radius 4 cm having a uniformly distributed surface charge 6.2 nC. What is the magnitude of the electric field it creates at a point 5 cm from its center, in units of kN/C? 1 ? Submit uest Ans Provide Feedback Next >Explanation / Answer
Q = 6.2 nC = 6.2*10^-9 C
r = 5 cm = 0.05 m
E = K*Q/r^2
= (9*10^9)*(6.2*10^-9)/(0.05)^2
= 2.2*10^4 N/C
= 22 KN/C
Answer: 22 KN/C