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AFIST2
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1. Homework Statement
hi
i need to perform the experiment described in this link
http://www.phywe.com/index.php/fuseaction/download/lrn_file/versuchsanleitungen/P2430400/e/P2430400.pdf
so i need to measure the torque
in the experiment they use Torsion dynamometer to do the job
but i need to measure the torque without this device
how can i do this manually?2. Homework Equations
τ = m × B = mBsinθ3. The Attempt at a Solution
i really don't have a good idea how to perform this but i may suggest the following ways:
we may use the equation:
τ=Iα
α is the angular acceleration and I is the inertia moment
but i think there is a problem with this because the torque is not constant but it change with time
because the angle between the field and the moment changes in time
so i don't really understand how this is works (what τ exactly they measure?)
another way is to attach a spring to the loop so there is anothe torque (in the opposite direction) that acts on the loop
therefore at equilibrium the magnetic torque will be the same as the spring torque
m × B = kx × r
therfore the torque i need is
τ=kx × r
and these quantities i can measure
please give me your opinions or better ideas to measure the torque
thanks in advance
hi
i need to perform the experiment described in this link
http://www.phywe.com/index.php/fuseaction/download/lrn_file/versuchsanleitungen/P2430400/e/P2430400.pdf
so i need to measure the torque
in the experiment they use Torsion dynamometer to do the job
but i need to measure the torque without this device
how can i do this manually?2. Homework Equations
τ = m × B = mBsinθ3. The Attempt at a Solution
i really don't have a good idea how to perform this but i may suggest the following ways:
we may use the equation:
τ=Iα
α is the angular acceleration and I is the inertia moment
but i think there is a problem with this because the torque is not constant but it change with time
because the angle between the field and the moment changes in time
so i don't really understand how this is works (what τ exactly they measure?)
another way is to attach a spring to the loop so there is anothe torque (in the opposite direction) that acts on the loop
therefore at equilibrium the magnetic torque will be the same as the spring torque
m × B = kx × r
therfore the torque i need is
τ=kx × r
and these quantities i can measure
please give me your opinions or better ideas to measure the torque
thanks in advance
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