Problem 5 Material for this Lab Experiment 4 Manual General

Problem 5: Material for this Lab Experiment 4 Manual General Lab Documents TOC and Introduction Appendix A: Error Analysis for the Physics Labs Appendix B: Introduction to Spreadsheets and EXCEL 2010 Problem Statement: Consider the following Part (a) Right after you open the switch in Figure 2(a), the voltage across the solenoid will: MultipleChoice: 1) remain positive but decrease to zero 2) change from positive to negative and then decrease to zero 3) remain at zero 4) remain unchanged at a positive value

Solution

When the swithce remain closed , voltage across the inductor is 0, the current is detrmined by R_x

When the switch is opened , current through the inductor decreases, and this develops an opposing potential across the inductor, the voltage across the inductor is given by

V= Ldi/dt, as current i is decreasing V is -ve.

hence volatge across the inductor goes to -ve and then comes back to 0 as shown in the figure. The same is shown in the plot (c).

choice = 2)