A circular coil with 232 turns has a radius of 2.4 cm. (a) What current through the coil results in a magnetic dipole moment of 2.6 A·m2? (b) What is the maximum torque that the coil will experience in a uniform field of strength 0.065 T?

A square coil and a rectangular coil are each made from the same length of wire. Each contains a single turn. The long sides of the rectangle are twice as long as the short sides. Find the ratio  T-square / T-rectangle of the maximum torques that these coils experience in the same magnetic field when they contain the same current.

A student makes a short electromagnet by winding 530 turns of wire around a wooden cylinder of diameter d = 4.4 cm. The coil is connected to a battery producing a current of 4.1 A in the wire. (a) What is the magnitude of the magnetic dipole moment of this device? (b) At what axial distance z >> d will the magnetic field have the magnitude 6.7 µT (approximately one-tenth that of Earth's magnetic field)?

A magnetic dipole with a dipole moment of magnitude 0.0306 J/T is released from rest in a uniform magnetic field of magnitude 57.6 mT. The rotation of the dipole due to the magnetic force on it is unimpeded. When the dipole rotates through the orientation where its dipole moment is aligned with the magnetic field, its kinetic energy is 0.573 mJ. (a) What is the initial angle between the dipole moment and the magnetic field? (b) What is the angle when the dipole is next (momentarily) at rest?

A certain superconducting magnet in the form of a solenoid of length 0.490 m can generate a magnetic field of 9.20 T in its core when its coils carry a current of 80 A. Find the number of turns in the solenoid.

A circular coil of 216 turns has a radius of 2.29 cm. (a) Calculate the current that results in a magnetic dipole moment of magnitude 2.64 A·m2. (b) Find the maximum magnitude of the torque that the coil, carrying this current, can experience in a uniform 52.5 mT magnetic field. (a) Number Units (b) Number i Units

A 15 turn circular wire loop that lies in the xy-plane has a diameter of 0.30 m. A current of 1.5 A travels through the loop such that the current is in the clockwise direction when viewed from above the xy-plane. The loop is in a uniform magnetic field: B = +1.5 T j – 2.0T k. (a) What is the magnetic moment of the current loop? (b) What is the torque exerted on the loop by the magnetic field? (c) What is the potential (orientation) energy of the coil in this magnetic field? As usual, set the potential energy equal to zero when the magnetic moment is perpendicular to the magnetic field. For any vector quantities give the answer in unit-vector notation.

A circular coil of 189 turns has a radius of 1.62 cm. (a) Calculate the current that results in a magnetic dipole moment of magnitude 3.16 A-m². (b) Find the maximum magnitude of the torque that the coil, carrying this current, can experience in a uniform 33.7 mT magnetic field. (a) Number i (b) Number i Units Units

PLEASE ONLY ANSWER A, NO NEED FOR B.