Give answer in a very neat and clean writing(if u r handwriting it) . If u give dirty, I will dislike it. ??

(b) Which of the following best describes the reason for the value of the emf when the magnet was inside the coil and not moving? The number of field lines through the coil was no longer changing, so the rate of change of magnetic flux was zero. Therefore, the emf in the coil was zero. The number of field lines was zero when it was inside the coil, because there are no field lines inside the magnet. Because the emf depends directly on the number of field lines, the emf at this point was zero. O The emf in the coil had the same constant value when the magnet was stopped as it did as when it was moving. The presence of any magnetic field, regardless of magnitude or rate of change causes the same emf in the coil. The number of field lines through the coil was a maximum at this point, so the magnetic flux through the coil was a maximum. The flux was no longer changing, so emf was a large positive constant value. (c) the two students dropped a magnet through a solenoid and graphed the current vs time as it fell. They noticed that the current (and therefore the emf as well) went from a positive value to a negative value as the magnet moved through the coil. Which of the following best explains the reason for this change in sign? The number of field lines through the solenoid went from rapidly increasing, to momentarily constant, to rapidly decreasing. The number of field lines through the coil went from a large value number pointing downward as the magnet entered, to zero when the magnet was inside, to a large number pointing upward as the magnet exited the solenoid. The magnet turned 180 degrees while inside the solenoid, changing the direction of the field lines, and causing the emf to change sign. The presence of the solenoid reversed the poles of the magnet while it was inside the solenoid, so that north became south and vice versa. The change in direction of the field lines caused the emf to change sign. (d) The two students noticed two peaks in the graph of current vs. time when the magnet fell through the solenoid. Why was the second peak larger in magnitude than the first? The magnet was moving faster upon exiting the solenoid than upon entering. Therefore, the rate of change of magnetic flux was larger. The magnet increases in strength as it moves faster. Therefore, the magnetic flux was larger. The magnet was dropped with its south pole facing down. Fewer field lines go into of the south pole than come out of the north pole. Therefore, there is less magnetic flux when the south pole enters at top than there is when the north pole exits at bottom. The magnet was dropped with its north pole facing down. Fewer field lines come out of the north pole than go into the south pole. Therefore, there is less magnetic flux when the north pole enters at top than there is when the south pole exits at bottom