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20 ohm 30 ohm and 50 ohm resistors conrcted in serise draw the circuit​

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Two resistors, 20 ohms and 30 ohms, are connected in parallel. This combination is connected in a series to an 8 ohms resistor and a battery of e.m.f. 12 volts. What is the current along 20 ohms?

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Satyadeo Vyas, M.Tech,MBA,AMIE,C.Eng,CEM. General Manager (E&I) at Birla Corporation Limited (1992-present)

Updated May 6

The total resistance of the circuit

=8+(20*30/50)

=8+600/50

=8+12

=20 Ohms

The total current of the circuit

I=12/20

I=0.6 Amp.

The total current flow through the 8-ohm resistor and divided into two parts in 20 and 30 Ohms resistance. Let the current flowing in the 20 Ohms resistance is I1.

I1=0.6*30/(20+30)

=0.6*30/50

=0.36 Amp