Three regulators of 12,15,20, ohm or connected in series first in series and then in parallel what is registrable in each case
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Total Resistance when they are connected in series = 12+15+20 =47 ohm
Total resistance when they are connected in parallel = 1/R= 1/12 + 1/15 + 1/ 20 =12/60 =1/5
R =5 ohm
Total resistance when they are connected in parallel = 1/R= 1/12 + 1/15 + 1/ 20 =12/60 =1/5
R =5 ohm
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