A rectangle loop at wire is pulled at a constant speed through a region magnetic
ID: 1458473 • Letter: A
Question
A rectangle loop at wire is pulled at a constant speed through a region magnetic field is directed UP out of the diagram and its magnitude is B = 1.0T which of the following changes (assuming all other quantities remained unchanged) would have no effect on the magnitude at the applied forces necessary to keep the loop moving in the direction shown with constant velocity? Doubling B and V Doubling V and doubling the (electrical) resistance R at loop. C) Reducing the length of the loop from 10cm to 5cm and doubling its width from 5cm to 10cm. E) Doubling the magnitude B and doubling the electrical resistance at loop.Explanation / Answer
applied Force = qvBsina
where q is the charge flowing in the magnetic field
a ) doubling B and V will change the magnetic field and increase it four fold.
b) will change the force
c) will have no effect on the applied force
d) it will have no effect on the applied force
e ) the force will be doubled