Answer all the following questions about a magnetic dropped into a solenoid expe

Question

Answer all the following questions about a magnetic dropped into a solenoid experiment and electronic field. Here is the graph picture.

3. The peaks in the graph have different shapes, one is always short and wide, the other taller and narrower. Why are the shapes different?

4. Suppose a magnet is initially held at rest above a solenoid with its north pole facing downward. Referring to Lenz's law, explain the sense of circulation of the current induced in the solenoid if the magnet is then moved upward, away from the solenoid.

Time and Voltage A Run #1 Time Voltage (s) 0.011 0.486 0.024 0.488 0.490 0.037 0.492 0,052 0.068 0.494. 0.496 0.084 0.101 0.498 There are three icons at the top of the graph display. The icon on the left rescales the graph to show all data. The middle icon shows selects a range of data points. The third icon gives the area under the selected region. 0.25 0.20 0.15 0.10 0.05 0.00 0.05 0.10 0.15 0.0 Voltage vs. Time 0.1 0.2 0.4 0.3 Time (s) Run #6 0.6 0.7

Explanation / Answer

When you are dropping a magnet its speed increases with time. The end induced in a solenoid depends on the rate of change of flux in the solenoid which is a function of speed. Initially since the speed is less the end will also be less it will take a longer time to gain the maximum emf hence the upper part of the graph is broader than lower one . As the magnet totally enters the solenoid the flux change will almost be zero hence emf drops to zero .As the magnet is moving out the flux is now reducing hence the emf direction is reversed than what it was when the magnet was entering and the flux was increasing. Hence the current is again induced in reverse direction increasing the emf , but since the speed increases more the solenoid attains maximum emf in a shorter duration of time . Hence the peak is thin . Circulation of current in the coil is opposite as the magnet enters and as it leaves

Hope this answers your question

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.