The force on a straight current-carrying wire in a magnetic field is proportional to the current in the wire, the strength of the field, and the of the wire. a) trueb) false

It is true

Explanation:

Force on a current carrying conductor placed in magnetic field is given by

F = B x i x l

where, B is the magnetic field strength, i be the current and l be the length of the conductor

So, the force depends on the magnetic field, current.

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. 

f is prop to m1xm2 double m1 double force