Question

Three resistant 10 OHm 20 Ohm and 30 ohm are connected in series and parallel Calculate the effective or equivalent resistance

Answer 1

R1=5 ohms, R2=10 ohms, R3=20 ohms.

These all three resistances are connected in parallel. As we known current is divided in parallel.

The equivalent resistance in case of parallel is:

1/Req = {(1/R1)+(1/R2)+(1/R3)}

1/Req = { (1/5)+(1/10)+(1/20)}

1/Req = { (4+2+1/20)}

1/Req = { (7/20)}

1/Req = {7/20}

1/Req = 0.35

Req = 1/0.35

Req = 2.856 ohms.