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AIPMT 2004 Physics and Chemistry Paper
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© examsnet.com
Question : 1
Total: 100
When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be :-
180 watt
10 watt
20 watt
60 watt
Validate
Solution:
If rated voltage = supply voltage then in series combination of bulbs
1
P
eq
=
1
P
1
+
1
P
2
+
1
P
3
+
.
.
.
.
.
.
For this question
1
P
eq
=
1
60
+
1
60
+
1
60
=
3
60
=
1
20
⇒
P
eq
=
20
watt
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