The parameters of an FET are gm = 3 mA/V, id = 30 k. RL

The parameters of an FET are g_m = 3 mA/V, i_d = 30 k. R_L = 3 k as a source follower load. The output impedance is given by—

Given that, g_m = 3 mA/V, r_d = 30 k, R_L = 3 k, R₀ =?
We know that

R₀ =	R'_L
	1 + g_mR'_L

in the case of source follower Where, R′_L = R_L || r_d = 3 k || 30 k

=	3 × 30		≈ 3 k.
	3 + 30

Now, R₀ =	3000
	1 + 3 × 10^–3 × 3000

=		3000	=	3000	= 300 Ω
		1 + 3 × 3		10

Hence alternative (D) is the correct answer.