Final answer:
The approximate value of input base resistance of a transistor can be calculated using the formula Rᵢₙ = (V₁ - V₂) / Iᵦ, where V₁ is the base-emitter voltage and Iᵦ is the base current. Using the given data, the approximate value of Rᵢₙ is 0.002 KΩ or 2 Ω.
Step-by-step explanation:
The input base resistance of a transistor can be approximated using the formula:
Rᵢₙ = (V₁ - V₂) / Iᵦ
where V₁ is the base-emitter voltage and Iᵦ is the base current.
Using the given data, we can calculate the input base resistance as follows:
Rᵢₙ = (0.71 - 0.68) / (100 - 85)
Rᵢₙ ≈ 0.03 / 15 ≈ 0.002 KΩ or 2 Ω (approx.)