13. The circular surface shown in the sketch has a radius of 10 cm. It B electri

Question

13. The circular surface shown in the sketch has a radius of 10 cm. It B electric field with magnitude 25 N/C. The field lines make a 30 angle with the vet surface, as shown in the sketch. What is the electric flux through the surface in N.mc in a uniform normal to the is immersed 30° A) 0.68 B) 15.08 15.08 D) 2.72 7.1x 10 2nC 14. Consider several point charges as shown in the figure below, having the following values: Qi a outside the cube, and q 10 nC and 5 nC inide the cube. What is the electric flux through the surface or the q- -5 nC and q cube shown in the figure? A) -339 N-m/C B) 226 Nm/C C) 113 Nm/c D) 565 Nm2/C E) None of the other answers are correct 04 02 01 03 15. An insulating sphere with an unknown total positive charge Q, on it s placed close to the center of a cavity The within a conducting spherical shell as shown in the figure. The shell has a total net charge of Q = 40 nC 20 nC. How much charge resides on INNER surface of the conducting shell has a measured total charge of Q the outer surface of the shell and what must be the value of Q.? outet B. Quter = +10 nC· Q, = +10 nC E. none of the above nner

Explanation / Answer

Electric flux, phi = E A cos(theta)

Phi = 25 x pi x 0.1^2 x cos30 = 0.68 Wb

So, correct answer is option (a)

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