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The figure shows a portion of a circuit. Resistor are known and indicated on diagram and voltmeter are identical. If voltmeters v_(1) and v_(2) reads 7.5v and 5v respecticely then reading of v_(3) |
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Answer» `0v`  `(I_(1))/(I_(2))=(3)/(2)` LET `I_(2)=x I_(1)=(3)/(2)x` `9xx(3)/(2)x-14x+5-7.5=0` `x=-5.0A=I_(2)` `-7.5A=I_(1)` `(27x-28x)/(2)=2.5` HENCE RESISTANCE of Voltemeter is `1Omega` `25I_(3) = -7.5xx9 = -75` `I_(3) = -3A` Hence `V_(3)=3.0V` |
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