Question

2: Question 11 (1 point) What is the magnitude of the electric field 3m away from a 2nC charge? E = , where k = 92 10°Nm? /C2 O9N/C ON/C O 6N/C 2N/C Next Page Page 11 of 18 search e

Answer 1

11. Electric field:

$E = \frac{kq}{r^2}$

$\Rightarrow E = \frac{9\times10^{9}\times2\times10^{-9}}{3^2}$

$\Rightarrow E = 2 N/C$

12.

Magnetic field due to a long wire is:

$B=\frac{\mu_0I}{2\pi d}$

$\Rightarrow B=\frac{\mu_0(3A)}{2\pi (5m)}$