For the zener diode shown in the figure, the zener voltage

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For the zener diode shown in the figure, the zener voltage at knee is 7V, the knee current is negligible and the zener dynamic resistance is 10Ω. If the input voltage (V₁) range is from 10 to 16V, the output voltage (V₀)—

1. 7 to 7.29 V
2. 7.14 to 7.29 V
3. 7.14 to 7.43 V
4. 7.29 to 7.43 V

Correct Option: C

Given, rz = 10Ω (zener dynamic resistance) (i.e., fig)
V_Z = 7V

I =	V_i – V_Z
	(200 + 10)

I_max =		Vi (_max) – V_Z	=	16 – 7	= 0.043A
		210		210

I_max =		Vi (_max) – V_Z	=	10 – 7	= 0.0143A
		210		210

Output voltage is given by
V₀ = Ir_Z + V_Z
Now V_{0 (max}) = I_max rZ + V_Z
or V_{0 (max)} = 0.043 × 10 + 7 = 7.43 V
and V_{0 (min)} = I_min r_Z + V_Z = 0.0143 × 10 + 7
= 7.143 ≈ 7.15V.
Hence alternative (C) is the correct choice.