Answers to Problems

Chapter 2:

1. a) 46 Ω b) 1.2 K c) 8.4 K d) 2.0 K e) 49 Ω;

2. a) 7.1 V b) 0.99 A c) 20V;

3. a) 150 Hz b) 50 Hz;

4. 58 hr, 8658 J;

5. a) I₁ = 10.9x10^-3 A, I₂ = 1.07x10^-3 A, V₁ = 54.5x10^-3 V,

b) I₁ = 2.96x10^-3 A, I₂ = 0.926x10^-3 A, V₁ = 2.04x10^-3 V,

c) I₁ = 96.5x10^-3 A, I₂ = 1.84x10^-3 A, V₁ = 12.6 V,

d) I₁ = -1.29x10^-3 A, V₁ = -4.27 V,

e) I₁ = -0.467x10^-3 A, I₂ = -7.85x10^-3 A, V₁ = -1.54 V;

6. a) i_C(t) = I_Se^-t/(RC), v_C(t) = I_SR(1-e^-t/(RC))

b) i_L(t) = I_S(1-e^-t/(L/R)), v_L(t) = I_SRe^-t/(L/R);

7. 1571.4 kg, 83.7 kW, 588 cm², 190 610 kg;

8. 112.5x10^-6 J, 15x10^-6 C;

9. I_max = 21.2 mA;

11. 20 dB, 100, 1000, 20 dB, 30 dB.