In this worksheet, we will practice calculating a conducting loop's self-inductance from the change rates of emf induced in it and the magnetic field produced by the loop.

**Q2: **

What is the self-inductance per meter of a coaxial cable whose inner radius is 0.500 mm and whose outer radius is 4.00 mm?

- A H/m
- B H/m
- C H/m
- D H/m
- E H/m

**Q3: **

An emf of 0.40 V is induced across a coil by changing the current through it. The current changes uniformly from 0.10 A to 0.60 A in 0.30 s. What is the self-inductance of the coil?

**Q4: **

A 25.0-H inductor has 100 A of current turned off in 1.00 ms. What voltage is induced to oppose this?

- A V
- B V
- C V
- D V
- E V

**Q5: **

What is the rate at which the current though a 0.30-H coil is changing if an emf of 0.12 V is induced across the coil?

**Q6: **

The current through a 7.0 mH inductor varies with time, as shown in the figure. The resistance of the inductor is 4.0 Ω.

Calculate the voltage across the inductor from to .

Calculate the voltage across the inductor from to .

Calculate the voltage across the inductor from to .