A0.676 m long section of cable carrying current to a car starter motor makes an angle of 57.7º with the earth’s 5.29 x 10^−5t field. what is the current when the wire experiences a force of 6.53 x 10^−3 n?

The current in the wire under the influence of the force is 216.033 A

Solution:

According to the question:

Length of the wire, l = 0.676 m

Magnetic field of the Earth,

Forces experienced by the wire,

Also, we know that the force in a magnetic field is given by:

I = 216.033 A

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.