{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

24 - Induction III

# 24 - Induction III - 1797-1878 Physics 212 Fall 2009...

This preview shows pages 1–6. Sign up to view the full content.

Physics 212 Fall 2009 Induction III Inductors 10/23/09 1797-1878

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Summary Faraday’s Law : A changing magnetic flux causes an EMF. Lenz’s Law: An induced current has a direction such that the magnetic field due to the current opposes the change in the magnetic flux that induces the current ε = N d Φ B dt d Φ B dt = E d s Δ V = E d s
Induced Current A triangular, aluminum loop is slowly moving to the right. Eventually, it will enter and pass through the uniform magnetic field region represented by the tails of arrows directed away from you. Initially, there is no current in the loop. When the loop is entering the magnetic field, what will be the direction of any induced current present in the loop? 1) clockwise 2) counterclockwise 3) no induced current

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Voltage and Current Wire #1 (length L) forms a one-turn loop, and a bar magnet is dropped through. Wire #2 (length 2L) forms a two-turn loop, and the same magnet is dropped through. Compare the magnitude of the induced currents in these two cases. 1) I 1 > I 2 2) I 1 < I 2 3) I 1 = I 2 0 4) I 1 = I 2 = 0 N S N S
What is an Inductor? Inductor : Device that stores magnetic flux Ex. coil, solenoid,toroid Capacitor: Device that stores charge Stores energy in the electric field C = q V Inductors are used in circuits: oscillating components, electronic noise shielding, isolation transformers,...

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 14

24 - Induction III - 1797-1878 Physics 212 Fall 2009...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online