ntly as the resistance, R, in ohms, and the square of the current, I, in amperes. If the wattage is 18 watts when the resistance is 50 ohms and the current is 0.6 amp. am. res.a) 30 watts b) 60 watts c) 9 watts d) 3000 watts e) none of these 20. Find th. center and the radius of the circle that.