Question

Thevenin's theorem. (QMC). Calculate the currents and /2 in the circuit of figure 2.21. Calculate also the potential difference across the current source and indicate its sign 10Ω 20Ω 1A Fig. 2.21

Answer 1

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V_A = electric potential at A = 6 Volts

V_B = electric potential at B = 1 x 20 = 20 Volts

Thevenin Voltage is given as

V_BA = V_B - V_A = 20 - 6 = 14 Volts

Thevenin equivalent resistance is given as

R_t = 30 ohm

current through 10 ohm resistor is given as

i = V_BA /(R_t + R) = 14/(30 + 10) = 0.35 A

at node B ,

i = i₁ + i₂

1 = 0.35 + i₂

i₂ = 0.65 A