Load matching in DC

% Load matching in dc.

r = 0: 0.1: 35;
i = 1./(1 + r);
u = r.*i;
p = i.*u;
plot(r, i, r, u, r, p)
xlabel(‘r = RL/Ri’)
text(r(5), i(3), ‘I/(U/Ri)’)
text(r(34), u(30), ‘UL/U’)
text(r(11), p(10), ‘P*(Ri/U \^{} 2)’)