# Worksheet: Self-Inductance of an Inductor

Q1:

A coil with a self-inductance of 3.0 H carries a current that decreases at a uniform rate A/s. What is the emf induced in the coil?

Q2:

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

Calculate the voltage across the inductor from to .

Calculate the voltage across the inductor from to .

Calculate the voltage across the inductor from to .

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:

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