The 20.0 cm by 35.0 cm rectangular circuit shown in the figure (Figure 1) is hin
ID: 1535779 • Letter: T
Question
The 20.0 cm by 35.0 cm rectangular circuit shown in the figure (Figure 1) is hinged along side ab. It carries a clockwise I = 4.95 A current and is located in a uniform 1.30 T magnetic field oriented perpendicular to two of its sides, as shown.
Determine which of the force(s) exert(s) a torque about the hinge ab?
Part C
Calculate the forces that exert a torque about the hinge ab mentioned in Part B. Express your answer in newtons to three significant figures.
Part D
Use your results from Part C to calculate the torque that the magnetic field exerts on the circuit about the hinge axis ab. Express your answer in newton meters to three significant figures.
F ab F bc F cd F da Hinge a 35.0 cm 20.0 cm.Explanation / Answer
a)The force which is exerting torque is Fcd. Since current is perpendicular to the magnetic field. ad and bc are exerting no force since they are parallel to magnetic field.also ab is fixed.
b) foce by magnetic field F= ILBsin
F = (4.95)(0.2)(1.3)(sin 90)
F = 1.287 N
C)
= FL
= (1.287)(.35) = 0.45 Nm
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