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KEAM 2012 Physics and Chemistry Paper
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© examsnet.com
Question : 59
Total: 120
Three identical bulbs connecte4 in series across an accumulator consumes 20 W power.If the bulbs are connected in parallel to the same source, the power consumed is
20 W
60 W
90 W
120 W
180 W
Validate
Solution:
If
N
bulbs are identical, then in series the total power
P
total
=
P
N
20
=
P
3
P
=
60
W
Each bulb has power of
60
W
.
In parallel combination,
P
=
P
1
+
P
2
+
P
3
=
60
+
60
+
60
=
180
W
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