Answer :
Final answer:
Two bulbs, one with a power rating of 100 W and the other 60 W both at 220 V, connected in parallel to a 220 V supply will draw a total current of 0.728 A from the mains supply.
Explanation:
The subject in question involves calculating the total current drawn by two light bulbs connected in parallel to a power supply with a given voltage. When two bulbs, one rated 100 W and 220 V and the other 60 W and 220 V, are connected in parallel to a 220 V mains supply, the total current drawn from the line can be calculated using the formula for power P = V * I, where P is power in watts, V is voltage in volts, and I is current in amperes.
For the 100 W bulb:
- I100 = P100 / V = 100 W / 220 V = 0.455 A
For the 60 W bulb:
- I60 = P60 / V = 60 W / 220 V = 0.273 A
The total current drawn from the main line Itotal = I100 + I60. Hence, Itotal = 0.455 A + 0.273 A = 0.728 A. Therefore, the main supply draws 0.728 amperes.