Question

The interbase resistance of an UJT is 8 KΩ and the intrinsic stand off ratio is 0.5. Calculate its base1 resistance.
Select one:
a. 0.4 Ohm
b. 4 Ohm
c. 4000 Ohm
d. 40 Ohm​

Answer 1

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Answer 2

Given:

Inter-base resistance (Rbb) = 8 KΩ

intrinsic stand off ratio (η) = 0.5

To find:

Calculate its base1 resistance (Rb₁)

Solution:

Rbb = Rb₁ + Rb₂

η = Rb₁ / (Rb₁ + Rb₂)

So, η = Rb₁ / Rbb

0.5 = Rb₁ / 8 KΩ

0.5 × 8 KΩ = Rb₁

So, Rb₁ = 4 KΩ

Rb₁ = 4000 Ω

Therefore, the value of base1 resistance (Rb₁) i equalt to 4 KΩ

Therefore, the correct option is (c) 4000 Ω