Final answer:
To determine the number of bulbs that can be safely used in a domestic circuit with a 5A fuse, we need to calculate the current drawn by each bulb. Using Ohm's Law, we can find the current drawn by a 100W, 220V bulb. By dividing the maximum current (5A) by the current drawn by each bulb, we can determine the number of bulbs that can be safely used: 11 bulbs.
Step-by-step explanation:
To determine how many bulbs of rating 100W, 220V can be safely used in a domestic circuit with a 5A fuse, we need to calculate the current drawn by each bulb.
Using Ohm's Law, we can find the current by dividing the power (100W) by the voltage (220V):
I = P / V = 100W / 220V = 0.45A
Since the circuit has a 5A fuse, we can calculate the number of bulbs that can be safely used by dividing the maximum current (5A) by the current drawn by each bulb:
Number of bulbs = 5A / 0.45A = 11.11
Therefore, we can safely use 11 bulbs of rating 100W, 220V in the circuit.