Question

find the equivalent resistance between A and B ​

Answer 1

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At first , I tell that ,

R1 = 1 ohm.

R2 = 2ohm.

R3 = 2ohm.

R4 = 2ohm.

Now, R2 and R3 are parallel combinations , so

R2 × R3 / R2 + R3 = 4/4 = 1ohm = R5.

Then, R1 and R4 and R5 is simple combinations so, R1 + R4 + R5 =( 1+ 2+ 1) = 4 ohm.

Now , the equivalent resistance between A and B is =》 4ohm. ( Answer).

Answer 2

Answer:

2ohm

Explanation:

R1= 1 ohm

R2= 2ohm

R3= 2ohm

R4= 2ohm

in parallel resistors:

1/Equalient resistance= 1/R2 +1/R3

1/R'= 1/2+1/2

1/R'= 2/2=1

R'= 1

in Series Resisters:

Equalient Resistance= R1+R'

Re= 1+1=2ohm

R4 is not used between point a and b that's why we ignore it's resistance.