Question

For the circuit given below, the value of the hybrid parameter h12 is ___________

(a) 6 Ω

(b) 5 Ω

(c) 1 Ω

(d) 2 Ω

I had been asked this question in an online interview.

Query is from Hybrid (h) Parameter topic in section Two-Port Networks of Network Theory

Answer 1

The correct choice is (c) 1 Ω

For explanation: Hybrid parameter h12 is given by, h12 = \(\frac{V_1}{V_2}\), when I1 = 0.

Therefore short circuiting the terminal X-X’ we get,

V1 = IA × 5

V2 = IA × 5

From the above equations, we get,

∴ \(\frac{V_1}{V_2} = \frac{I_A×10}{I_A×10}\) = 1

Hence h12 = 1 Ω.