H12 Flashcards

1
Q

ideale spoel

A

weerstandloze draad die is opgewikkeld

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2
Q

elektrische eigenschappen van een spoel

A
  • lengte l
  • aantal windingen N
  • diameter d (te verwaarlozen)
  • omringend materiaal Rm
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3
Q

Rm

A

magnetische weerstand van het materiaal

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4
Q

solenoïde

A

spoel zonder ferromagnetische kern -> luchtkern

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5
Q

Φ

A

flux(verandering)

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6
Q

B

A

inductie = fluxdichtheid

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7
Q

u(r)

A

relatieve permeabiliteit

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8
Q

ferromagnetische stoffen

A

u(r) > > 1

bv. ijzer, nikkel…

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9
Q

paramagnetische stoffen

A

u(r) > 1 => B > H

bv. aluminium, platina, lucht…

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10
Q

diamagnetische stoffen

A

u(r) < 1 => B < H

bv. goud, koper, lood…

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11
Q

inductieverschijnselen van een spoel

A
  • fluxverandering
  • stroomverandering van de spoel zelf = elektromagnetische zelfinductie
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12
Q

L

A

zelfinductiecoëfficiënt ~ zelfinductieweerstand

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