A thin 2.37 m long copper rod in a uniform magnetic field has a mass of 41.9 g. When the rod carries a current of 0.268 A directed perpendicular to the magnetic field, it floats in the magnetic field.
The acceleration of gravity is 9.81 m/s2 .
What is the field strength of the magnetic field?
Answer in units of T.

Question

A thin 2.37 m long copper rod in a uniform magnetic field has a mass of 41.9 g. When the rod carries a current of 0.268 A directed perpendicular to the magnetic field, it floats in the magnetic field.
The acceleration of gravity is 9.81 m/s2 .
What is the field strength of the magnetic field?
Answer in units of T.

irishboy123 · Answer

do you have an answer and want a check, or are you looking for a steer?

anonymous · Answer

for an equation, i dont know how to set it up

irishboy123 · Answer

basic equation for force on a straight wire conductor in a magnetic field: F = B I L

but drawing is always helpful

the expression "floats in the magnetic field" is interesting as G will want to pull the wire down into the centre of earth

can you draw this?

irishboy123 · Answer

correction:
G = g = gravity

anonymous · Answer

i dont think i can draw it ,but i would just have to find F then?

irishboy123 · Answer

yes, F is what you are after

anonymous · Answer

okay thankyou(:

irishboy123 · Answer

cool