In the given figure, the Thevenin’s equivalent pair (voltage,

In the given figure, the Thevenin’s equivalent pair (voltage, impedance), as seen at the terminals P–Q, is given by—

The given circuit:

R_th Calculation:

R_th = 10 || 10 = 5Ω
V_th Calculation:

I =	4V	=	4V	= 0.4 A
	R_eq		10Ω

I₁ = 0.4 ×	20	= 0.2A
	20 + 20

V_th = I₁ × 10Ω = 0·2 × 10 = 2V
Hence alternative (A) is the correct choice.