Three resistors of 10, 15 and 'X' ohms, respectively are connected in parallel across a constant current source of 8 A. Determine 'X' if this resistor draws 2.5 A.

Answer 1

Let 8= i₁ +i₂ +2.5 so that i₁ +i₂ =5.5 so now V/10 + V/15 =5.5 which gives V(1/10 + 1/15) =5.5. Simplifying gives 25V= 5.5• 150 yields V=33 volts. So 33=2.5x. Solving for x gives x=13.2 ohms.