***********find the equivalent resistance between the points P and Q in the given circuit and current through the resistance of 25 ohm.
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series connection adds resistance r = r1 + r2
in parallel 1/r = 1/r1 + 1/r2
so 14 and 6 are in series which means they add to be 20 ohms
now above 20 is parallel to given 20 = 20/2=10 ohms
now above 10 is series 10 given is 20 ohms
again 20 and 20 are parallel = 10 ohms***
now 10 and 25 are series= 35 Ohms
i=v/r = 70/35 = 2A
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