Final answer:
The resistance of an electric iron that draws a current of 4 amperes from a 220-volt source is calculated using Ohm's Law and is found to be 55 ohms.
Step-by-step explanation:
The resistance of the electric iron can be calculated using Ohm's Law, which states that Voltage (V) = Current (I) × Resistance (R). We are given that the electric iron draws a current of 4 amperes when connected to a 220-volt source. To find the resistance, we rearrange the formula to R = V / I.
Plugging in the values, we get R = 220 volts / 4 amperes = 55 ohms. Therefore, the correct answer is (c) 55 ohms.