Question

How many $60W$ bulbs may be safely run on $220V$ using a $5A$ fuse?

• A. $18$
• B. $16$
• C. $14$
• D. $12$

Answer 1

The correct option is A $18$

First we need the total power that this connection is using

So

$P=V\times I$

$P=220\times 5$

$P=1100watts$

Now, number of 60 watts bulbs safely run on this power are

$n=\frac{1100}{60}$

$n=18.33$

So, 18 bulbs of 60 watts may be safely run on 220V using a 5A fuse.