Question

What is the maximum number of 60 W bulbs that can be run from the mains supply of 220 volts if you do not want to overload a 5 A fuse?

Answer 1

Answer:

Maximum number of bulbs =18

Explanation:

As per the given data of the question,

We have,

Power of 1 bulb = 60 W

Main supply voltage = 220 Volts

Current = 5 A

Let suppose the maximum number of bulbs required = n

∴ Power of n bulb = power of 1 bulb × n = 60n W

Now, we know the formula for power,

Power = Voltage × Current

⇒ 60n = 220 × 5

⇒ n = 18.33

Since the number of bulbs can not be in fraction. Therefore the nearest possible integer is 18.

Hence, the maximum number of bulbs that can run safely = 18

Answer 2

Answer:

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