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AIEEE 2004 Physics Solved Paper
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© examsnet.com
Question : 41
Total: 78
An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii are in the ratio of
4
3
and
2
3
, then the ratio of the current passing through the wires will be
8
9
1
3
3
2
Validate
Solution:
i
1
R
1
=
i
2
R
2
(same potential difference)
V
=
I
1
R
1
=
I
1
×
ρ
l
1
π
r
1
2
Also
V
=
I
2
R
2
=
I
2
×
ρ
l
2
π
r
2
2
∴
l
1
×
ρ
l
1
π
r
1
2
=
I
2
×
ρ
l
2
π
r
2
2
⇒
I
1
I
2
=
ℓ
1
ℓ
2
×
r
1
2
r
2
2
=
3
4
×
4
9
=
1
3
© examsnet.com
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