Question

A wire of what resistance must be connected in parallel to a wire of 5 ohm resistance 4 ohm my be obtained ​

Answer 1

Answer:

the answer is 20 ohm

Explanation:

LET THE RESISTANCE TO FIND BE R

1/4=1/5+1/R

1/4=R +5/R5

R5=R4+20

R5-R4=20

R (5-4)=20

R =20 ohm

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