In the figure, point P2 is at perpendicular distance R = 21.8 cm from one end of straight wire of length L = 11.3 cm carrying current i = 0.950 A. (Note that the wire is not long.) What is the magnitude of the magnetic field at P2? Pit R R Number Units TA student makes a short electromagnet by winding 470 turns of wire around a wooden cylinder of diameter d = 3.6 cm. The coil is connected to a battery producing a current of 5.2 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 4.4 uT (approximately one-tenth that of Earth's magnetic field)? (a) Number 2504.02 Units A (b) Number 0.119 Units mA long solenoid has a diameter of 13.9 cm. When a current i exists in its windings, a uniform magnetic field of magnitude B = 41.0 mT is produced in its interior. By decreasing i, the field is caused to decrease at the rate of 5.01 mT/s. Calculate the magnitude of the induced electric field (a) 3.17 cm and (b) 8.52 cm from the axis of the solenoid. (a) Number Units (b) Number Units