**Question**

**A heater of resistance 50 Ω is connected to a 220 V line. How much current will this heater draw?**

**Answer**

Given that the resistance of the heater is R = 50 Ω and the voltage across it is V = 220 V, we can substitute these values into the formula to get:

I = V / R

I = (220 V) / (50 Ω) = 4.4 A

Therefore, the heater will draw a current of 4.4 A from the 220 V line.