phy-r.s.m. current

Variation A
(a) power = 2^2 x 50 w = 200 w
(b) zero
(c) Enery dissipated = 200 x (50/1000) J = 10 J
(d) Current = square-root[10/(50 x 0.1)] A = 1.414 A

Variation B
(a) power = 2^2 x 50 w = 200 w
(b) power = (-2)^2 x 50 w = 200 w
(c) Energy dissiapted = 200 x (100/1000) J = 20 J
(d) current = square-root[20/(50 x 0.1)] A = 2 A