Magnetism (4 of 13) Magnetic Field of a Wire, Calculations

The strength of the magnetic field is:

• 1 x 10² T

• 1 x 10^-6 T

• 1 x 10^-8 T

The current required to generate this field is closest to:

• 4.3A

• 4.8A

The distance (r) from the wire that will feel a magnetic field strength of 7T is closest to:

• 0.15 m

• 0.45 m

This is pretty easy money as long as we remember to watch our order of operations and units (paying particular attention to the _o units (T-m/A) so we end up with the right units.

• True dat!

• I think we can just smash random numbers and units together and get the right answer every time.