1.

2RThe effective resistance between points P and Q of theelectrical circuit in figure is㈼2Rr / (R + r)(B) 8R(R-r)/ 3R + r(C) 2r + 4R(D) 5R/2+2rxy-2R2R2R2Rad in scries with a battery in a circuit. The

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As it is a wheatstone bridgeso middle resistance can be removedand now



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