Question

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Answer 1

Answer:

9ohm

12 6 4 are in parallel so 1/R=1/12+1/6+1/4=1/2.

R=2

finally 2 ohm 5 ohm 2 ohm are in series

R=2+5+2=9onm

Answer 2

Answer:

Explanation:

the resistances 12ohm , 6 ohm and 4ohm are connected in parallels,

> 1/r = 1/12 + 1/6 + 1/4

> 1/r = 1 + 2 + 3 / 12  ( lcm )

> 1/r = 6/12

> 1/r = 1/2

> r = 2 ohm

______________________

now we can see that 2ohm , 2ohm ( solved above ) , and 5ohm are connected in series,

> R = 2 + 2 + 5

> R = 9 ohm

therefore , the equivalent resistance is 9 OHM

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