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016

Gegeven:
R1 = 20 ohm
R2 = 40 ohm

Gevraagd :
geleidbaarheid bij parallel schakelen.

Oplossing:

R = 1 : S

S1 = 1/20 = 50 mS
S2 = 1/40 = 25 mS

S_tot = S1 + S2 = 75 mS

R_tot = 1/S_tot = 1/ 75 mS = 13.3 Ohm

of ZO >>>

Rv = 1 : ( 1 : R1 + 1 :: R2 )

Rv = 1 : ( 1 : 20 + 1 : 40 ) = 13.333 Ohm

S = 1 : R

S = 1 : 13.333 = 0.075 = 75 mS