Given the h parameters for common emitter hi e = 1000 ohms,

Given the h parameters for common emitter h_i ^e = 1000 ohms, h_fe = 49, h_oc = 1 / 40 × 10³ and h_re = 0, the values of h_ib and 1 / hob_{are given by—}

1. 1000 ohms, 40 k ohms
2. 20 ohms, 800 ohms
3. 50 k ohms 40 k ohms
4. 20 ohms and 2 M ohms

By using the conversion formula

h_ib =		h_ie	=	1000	= 20
		1 + h_fe		1 + 49

h_ob =	h_oe
	1 + h_fe

h_ob =		1			1
		40 × 10³			1 + 50

1	= 40 × 50 × 10³
h_ob

= 2 × 10⁶ Ω = 2 M Ω