ch27-p056 - 56. The currents in R and RV are i and i' i,...

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56. The currents in R and R V are i and i' – i , respectively. Since V = iR = ( i' – i ) R V we have, by dividing both sides by V , 1 = ( i' / V – i / V ) R V = (1/ R' – 1 / R ) R V . Thus, 11 1 '. V VV RR R R RR =− = + The equivalent resistance of the circuit is eq 0 0 ' V AA V RR R R R R R R =++=++ + . (a) The ammeter reading is () ( ) ( ) eq 0 2 12.0V 3.00 100 300 85.0 300 85.0 7.09 10 A. AV V i R R R R R εε == = ++ + + + + (b) The voltmeter reading is
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