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JEEMAIN and NEET
>>
Physics
>>
Class12
>>
Current Electricity
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Q)
Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are
R
1
a
n
d
R
2
(
R
2
>
R
1
)
. If the potential difference across the source having internal resistance
R
2
is zero then,
(
A
)
R
=
R
2
×
(
R
1
+
R
2
)
/
R
2
−
R
1
)
(
B
)
R
=
R
2
−
R
1
(
C
)
R
=
R
1
R
2
/
(
R
1
+
R
2
)
(
D
)
R
=
R
1
R
2
/
(
R
2
−
R
1
)
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