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Class 12 NEET Physics Current Electricity Questions Part 1
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© examsnet.com
Question : 50
Total: 100
In India electricity is supplied for domestic use at
220
V
. It is supplied at
110
V
in USA. If the resistance of a
60
W
bulb for use in India is
R
, the resistance of a
60
W
bulb for use in USA will be
(2004)
R
2
R
R
4
R
2
Validate
Solution:
In India,
P
I
=
(
220
)
2
R
In
U
S
A
,
P
U
=
(
110
)
2
R
U
as
P
I
=
P
U
⇒
(
220
)
2
R
=
(
110
)
2
R
U
⇒
R
U
=
110
×
110
220
×
220
R
=
R
4
© examsnet.com
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