Question

what is the resistance between A and B in the figure given below
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Answer 1

Explanation:

Start solving from the right side.

The resistances are in series, therefore total resistance=50ohm

50ohm and 30ohm are in parallel therefore resultant resistance =18.7 ohm

Now, all are in parallel thus the overall resultant resistance= 10ohm+10ohm+18.7ohm=38.7ohm.

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Answer 2

3 resistances on the right hand side are in series so their net resistance will be

20+20+10=50 ohm

Now this 50 and 30 ohm resistances are in parallel

So

50×30/50+30

1500/80

150/8

38.75 ohm

So resistance between point A and B is 38.75 ohm

Now all remaining resistances are in series

So 10+10+150/8

20 + 150/8

(160+150)/8

310/8