Midterm Solutions for Phys 5121 Fall 95

Problem 1

1a)

V₁ = i₁ R₁ + V₂ + i₁ R₂ + i₂ R₂

V₃ = i₂ R₃ + i₂ R₂ + i₁ R₂ + i₂ R₄

1b)

1c)

d)

3

e)

see a textbook

Problem 2

The circuits are equivalent if Re(Zp) = Re(Zs) and Im(Zp) = Im(Zs), i.e.

Problem 3

3a & b)

V_b = 1.5 V

V_e = 0.9 V

I_e = I_c = 0.9 mA

V_c = 10.5V

I_b = 9uA

3c)

G₁ = +1

3d)

G₂ = -5

3e)

Z_in = 8.26k

3f)

G_out2 = -25