what resistance must be connected to a 20 ohm resistor to get an effective resistance of 4 ohm
Answers
Answered by
5
if in series
20+x=4
x=-16 not possible
if in parrallel
20*x/20+x=4
20x=80+4x
16x=80
x=5
i.e if you connect
20 ohm and 5 ohm in parrallel
effective resistance will be 4 ohms
20+x=4
x=-16 not possible
if in parrallel
20*x/20+x=4
20x=80+4x
16x=80
x=5
i.e if you connect
20 ohm and 5 ohm in parrallel
effective resistance will be 4 ohms
Answered by
2
r×R/r+R =4
r=20
R=?
20×R/20+R=?
20R=80+4R
R=80/16=5
r=20
R=?
20×R/20+R=?
20R=80+4R
R=80/16=5
honey181:
thanks
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