Question: A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt calculate the effective resistance




12o ohm, 60 ohm and 40 ohm resistor are connected in parallel, the equivalent resistance will be
1/reff = 1/r1+1/r2+1/r3
1/reff = 1/120+1/60+1/40
1/reff= 6/120
1/reff=1/20
Reff=20 ohms

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