

What do you THINK will happen when you release the ball at the upper line? What happens when you release the ball at the lower line?Īnswer: The ball doesn’t make it around the loop.

Calculate the magnitude and direction of the torque τ and the value of the potential energy U as given in U = – μ x B= – μB cos φ, when the coil is oriented as shown in parts (a) through (d) of Fig. There is a uniform magnetic field B in the positive y-direction.
#Loop the loop physics calculator free
Α = ∑τ/I = 3.00 N.m/0.01031 kg.m 2 = 290.98 rad/s 2Ī circular coil with area A and N turns is free to rotate about a diameter that coincides with the x-axis. The 2 0.5-m sides rotate about their centers, and the 2 1.0-m sides rotate about a parallel axis. To find the moment of inertia of the coil, consider each side as a uniform bar. And each 0.500-m side has a mass of 0.0353 kg. Now, each 1.00 m side has a mass of 0.0707 kg. (b) the initial angular acceleration of the coil just after the current is started is Since t = IBA sin f then only the top and bottom sides will experience torque, thus will rotate about A 2. (a) About which axis (A 1 or A 2) will the coil begin to rotate? Why? (a) diagram showing the direction of the force that the magnetic field exerts on each segment of the circuit (ab, bc, etc.) shown by the Figure 2. (c) Use your results from part (b) to calculate the torque that the magnetic field exerts on the circuit about the hinge axis ab.Īrea, A = 20.0 cm x 35.0 cm = 0.2 m x 0.35 m Then calculate only those forces that exert this torque. (b) Of the four forces you drew in part (a), decide which ones exert a torque about the hinge ab. (a) Draw a clear diagram showing the direction of the force that the magnetic field exerts on each segment of the circuit (ab, bc, etc.). It carries a clockwise 5.00-A current and is located in a uniform 1.20-T magnetic field oriented perpendicular to two of its sides, as shown. The 20.0 cm x 35.0 cm rectangular circuit shown in Fig. (c) the maximum torque that can be obtained with the same total length of wire carrying the same current in this magnetic field is when maximum area is when the loop is circular with radiusĪ = πR 2 = π(0.0414 m) 2 = 5.38 x 10 -3 m 2 and (a) What torque acts on the loop? (b) What is the magnetic moment of the loop? (c) What is the maximum torque that can be obtained with the same total length of wire carrying the same current in this magnetic field?Īrea, A = 5.0 cm x 8.0 cm = 0.05 m x 0.08 m Problem#1The plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19-T magnetic field.
