Q34:For the circuit shown in Figure P28.34, we wish to find the currents I1, I2, and I3. Use Kirchhoff’s rules to obtain equations for
(a) the upper loop,
(b) the lowerloop, and
(c) the junction on the left side. In each case, suppress units for clarity and simplify, combining the terms.
(d) Solve the junction equation for I3.
(e) Using the equation found in part (d), eliminate I3 from the equation found in part (b).
(f) Solve the equations found in parts (a) and (e) simultaneously for the two unknowns I1 and I2.
(g) Substitute the answers found in part (f) into the junction equation found in part (d), solving for I3.
(h) What is the significance of the nega- tive answer for I2?