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Standard VIII
Physics
Question
How many
60
W
bulbs may be safely run on
220
V
using a
5
A
fuse?
18
16
14
12
A
18
B
16
C
12
D
14
Open in App
Solution
Verified by Toppr
The correct option is
A
18
First we need the total power that this connection is using
So
P
=
V
×
I
P
=
220
×
5
P
=
1100
w
a
t
t
s
Now, number of 60 watts bulbs safely run on this power are
n
=
1100
60
n
=
18.33
So, 18 bulbs of 60 watts may be safely run on 220V using a 5A fuse.
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