PRE-LAB QUESTIONS
Please complete the following questions before coming to the lab, and bring your answers with you to the lab:
- What does it mean for a circuit element to have an internal resistance? As an example, how does the internal resistance of an ammeter affect the measurement of current?
- For a given current I and internal resistance R, how would you model the voltage from the internal resistance of a circuit element? Hint: how do you model the voltage from a regular resistor?
- For an inductor, how does the electromotive force relate to the current and inductance of that inductor? Please provide an equation.
Set yourself the following objectives for this lab:
- Experimentally examine an inductor and how it is connected to a circuit
- Interpret the effects of internal resistance on circuit analysis from various circuit elements
- Experimentally measuring the internal resistance of various circuit elements
- Charging an inductor through a series RL circuit to determine the time constant and inductance
- Discharging an inductor through a parallel RL circuit and interpreting the effects of internal resistance
The following shows the value of all the questions in this lab:
| Laboratory 4, Question Grading Scheme | Totals | ||||
| Part 1 | Question 1 | Question 2 | Question 3 | ||
| Points | /1 | /1 | /2 | /4 | |
| Part 2 | Question 4 | Question 5 | Question 6 | Question 7 | |
| Points | /1 | /2 | /1 | /2 | /6 |
| Total number of points in this lab | /10 | ||||
The following shows the value of all the tables and graphs in this lab:
| Laboratory 4, Results Grading Scheme | Totals | ||||
| Part 1 | Question 1 | Question 2 | Question 3 | ||
| Points | /1 | /1 | /2 | /4 | |
| Part 2 | Question 4 | Question 5 | Question 6 | Question 7 | |
| Points | /1 | /2 | /1 | /2 | |
| Total number of points in this lab | /10 | ||||