At a certain location, Earth's magnetic field of 44 µT is horizontal and directed due north. Suppose the net field is zero exactly 11 cm above a long, straight, horizontal wire that carries a constant current. What is (a) the magnitude of the current (in A) and (b) the angle between the current direction and due north?

a) The magnitude of the current is 24.19 A

b) The angle is 90°

Explanation:

a) Given:

B = magnetic field = 44 µT = 44x10⁻⁶T

r = distance = 11 cm = 0.11 m

The current is:

b) Because the current flows from the west to the east, therefore, the angle is 90 degrees from the north.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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