Two long straight wires are parallel and carry current in opposite directions. the currents are 8.0 and 12 a and the wires are separated by 0.40 cm. the magnetic field in tesla at a point midway between the wires is:

2 mT perpendicularly inwards to the plane of paper

Explanation:

i1 = 8 A

i2 = 12 A

Let 8 A is in upward direction and 12 A is in downward direction

The magnetic field at point P due to 8 A current

B1 = 8 x 10^-4 T Perpendicular inwards to the plane of paper

The direction of magnetic field is calculated by the Maxwell's right hand grip rule.

The magnetic field at point P due to 12 A current

B1 = 12 x 10^-4 T Perpendicular inwards to the plane of paper

The direction of magnetic field is calculated by the Maxwell's right hand grip rule.

Theresultant magnetic field at point P

B = B1 + B2 = ( 8 + 12) x 10^-4 = 20 x 10^-4 T

B = 20 x 10^-4 T = 2 mT perpendicularly inwards to the plane of paper

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.