1.

Find the value of V if the current in the 3 ohm resistor=0.(a) 3.5V(b) 6.5V(c) 7.5V(d) 8.5V

Answer» Right choice is (c) 7.5V

The best I can explain: Taking the mesh currents in the three meshes as I1, I2 and I3, the mesh equations are:

3I1+0I2+0V=5

-2I1-4I2+0V=0

0I1+9I2+V=0

Solving these equations simultaneously and taking the value of I2=0, we get V=7.5V.


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