Magnetic flux (8) Flashcards Preview

Physics A-Level AQA definitions > Magnetic flux (8) > Flashcards

Flashcards in Magnetic flux (8) Deck (7)
Loading flashcards...
1
Q

Fleming’s left-hand rule

A

used to determine the directions of force, magnetic field and current or velocity.

2
Q

Magnetic flux ϕ

A

magnetic flux density × cross-sectional area perpendicular to field direction (measured in webers).

3
Q

Weber

A

the weber (Wb) is the unit of magnetic flux, equal to 1 tesla metre2 (1Tm2).

4
Q

Magnetic flux linkage

A

magnetic flux linked by a coil, calculated as magnetic flux ϕ × number of turns N of the coil (measured in weber-turns).

5
Q

Weber-turns

A

the unit of magnetic flux linkage.

6
Q

Faraday’s law

A

the induced e.m.f. equals the rate of change of (magnetic) flux.

7
Q

Lenz’s law

A

the direction of the induced e.m.f. causes effects that oppose the change producing it.