In figure, all transistors are identical and have a high

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In figure, all transistors are identical and have a high value of beta (β). The voltage V_DC equal to—

1. 10 V
2. 0 V
3. 15 V
4. 5 V

Correct Option: D

From figure

		I_E2	= 1 +	2	≈ 1 as β is of high value.
		IC₃		β

Thus I_E2 = I_C3
I_C3 ≈ 5 mA
and I_C2 ≈ I_E2
so V₀ = V_CC – (1 kΩ) × I_C2
or V₀ = 10 – 1 × 10³ × 5 × 10^{– 3}
or V₀ = 10 – 5
or V₀ = 5 V
Hence alternative (D) is the correct answer.