For a given circuit the thevenin equivalent is to be determined.

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For a given circuit the thevenin equivalent is to be determined. The thevenin voltage V_Th(in volts), seen from terminal AB is __________.

1. 123
2. 13.36
3. 3.36
4. 31.6

Correct Option: C

Apply KVL
2 = 1(i + I₁ ) + 1i
2 = 2i + I₁ .......(i)
2 = 1(i + I₁ ) - 20i + 2I₁
2 = – 19i + 3I₁ .......(ii)
Solving equations, (i) & (ii)
I₁ = 1.68 Amp
Thevenin’s voltage,
V_th = 2I₁ volt = 2 × 1.68
V_th = 3.36 volt