1. A charge of -4.35 uC is located at the origin. Find the electric field at a p
ID: 1283282 • Letter: 1
Question
1. A charge of -4.35 uC is located at the origin. Find the electric field at a point 6.38 cm along the -x axis, that is, at the point (-6.38, 0.00) cm. Answer in the x and y components format of the field
2. A current of -4.35 A is located at the origin. (This current flows parallel to the z axis, with a positive current flowing in the + k direction.) Find the magnetic field at a point 6.38 cm along the -x axis, that is, at the point (-6.38, 0.00) cm. Answer in the x and y components format of the field
Explanation / Answer
1)
Electric fiedl due to point charge is
E = kq / r^2 = (9*10^9 Nm^2 / C^2 ) ( 4.35*10^-6 C ) / (6.38*10^ -2 m ) ^2
= 9.618*10 ^ 6 N /C i
Since charge in negative, the direction of field is towards the charge.
2)
Magnetic field due to current is
B = (mu_o I ) / 2pi d
= (4pi *10^ -7 ) T / A ) ( 4.35 A ) / 2 pi (6.38 *10^ -2 m )
=1.35*10^-5 T
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