Inductance (27-05-21) 1H Lesson

8 Slides • 4 Questions

1

Inductance (27-05-21) 1H

2

3

Chapter Outline

1. Self-Inductance

2. RL Circuits

3. Oscillations in LC Circuit

4

1. Self-Inductance

When the current in a coil changes with time, an induced in the coil according to Faraday's law. The self-induced emf is:

$e=-N\ \frac{\text{d}\Phi}{\text{d}t}=-L\ \frac{\text{d}I}{\text{d}t}$

where L is the inductance of the coil. Inductance is a measure of how much oposition an electrical device offers to a change in current passing through the device.

5

Inductance has the SI unit of henry (H), where 1H = 1 V.s/A
The inductance of any coil is

L\ =\ \frac{N\Phi_B}{I}

where

\Phi_B

is the magnetic flux through the coil and N is the total number of turns. The inductance of a device depends on its geometry. For example, the inductance of an air-core solenoid is

L\ =\ \mu_0\ \frac{N^2A}{l}

where

A

is the cross-sectional area, and

l

is the length of the solenoid.

6

7

Multiple Select

Which of the following formula refer to self-induced emf?

1

a. $L\ =\ \mu_0\ \frac{N^2A}{l}$

2

b. $L\ =\ \frac{N\Phi_B}{I}$

3

c. $e=-L\ \frac{\text{d}I}{\text{d}t}$

4

d. $e=-N\ \frac{\text{d}\Phi}{\text{d}t}$

8

Multiple Choice

Which of the following formula refer to inductance of any coil?

1

a. $L\ =\ \mu_0\ \frac{N^2A}{l}$

2

b. $L\ =\ \frac{N\Phi_B}{I}$

3

c. $e=-L\ \frac{\text{d}I}{\text{d}t}$

4

d. $e=-N\ \frac{\text{d}\Phi}{\text{d}t}$

9

Multiple Choice

Which of the following formula refer to inductance of air-core solenoid?

1

a. $L\ =\ \mu_0\ \frac{N^2A}{l}$

2

b. $L\ =\ \frac{N\Phi_B}{I}$

3

c. $e=-L\ \frac{\text{d}I}{\text{d}t}$

4

d. $e=-N\ \frac{\text{d}\Phi}{\text{d}t}$

10

Let's try!

Answer in the next slide.

11

Multiple Choice

Answer to question 2 is

1

$1.36\ \mu H$

2

$1.36\ H$

3

$13.6\ \mu H$

4

$136\ \mu H$

12

Your Homework! (HW1)

https://forms.gle/s4mWBcLzTa5Am2cw7

Inductance (27-05-21) 1H

Show answer

Auto Play

Slide 1 / 12

SLIDE

Similar Resources on Wayground

11 questions

Magnetism

Presentation

•

9th - 10th Grade

8 questions

Classifying & Activity Series Lesson

Presentation

•

9th - 12th Grade

7 questions

Acceleration Introduction

Presentation

•

9th - 12th Grade

10 questions

Momentum and Impulse

Presentation

•

10th - 12th Grade

10 questions

Física III: Materia, energía e interacciones

Presentation

•

1st - 3rd Grade

9 questions

Momentum, Impulse, and Force

Presentation

•

10th - 12th Grade

11 questions

Rational Exponents and Radicals

Presentation

•

10th - 12th Grade

7 questions

Momentum and Impulse Introduction

Presentation

•

10th - 12th Grade

Popular Resources on Wayground

24 questions

PBIS-HGMS Day 10

Quiz

•

6th - 8th Grade

10 questions

HCS SCI 03 Summer School Review 3

Quiz

•

3rd Grade

11 questions

Home Scope

Quiz

•

7th - 8th Grade

15 questions

HCS SCI 05 Summer School Assessment 3 Review

Quiz

•

5th Grade

35 questions

Lufkin Road Middle School Student Handbook & Policies Assessment

Quiz

•

7th Grade

18 questions

Geo 11.3 Area of Circles and Sectors

Quiz

•

9th - 11th Grade

Discover more resources for Physics

18 questions

Geo 11.3 Area of Circles and Sectors

Quiz

•

9th - 11th Grade