NEET Questions Solved

PMT - 2004

In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to 3 volt. The voltage across the resistance R4 is 

(1) 0.4 V

(2) 0.6 V

(3) 1.2 V

(4) 1.5 V

(1) Equivalent resistance of the given network Req=75Ω

∴ Total current through battery i=375

i1=i2=375×2=3150

Current through R4=3150×60(30+60)=3150×6090=2150A

V4=i4×R4=2150×30=25V=0.4V

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