Physics, asked by sharmasaumya940, 4 months ago

The resistivities, the lengths and the radii of two wires are in the ratios 2 : 3, 3 : 5 and 2 : 7 respectively. Their resistances are in the ratio ​

Answers

Answered by Anonymous
0

Explanation:

R

1

=(

ρ

2

ρ

1

)(

L

2

L

1

)(

A

1

A

2

)

=(

ρ

2

ρ

1

)(

L

2

L

1

)(

r

1

2

r

2

2

)

=

3

2

×

5

3

×(

7

2

)

−2

[

r

1

r

2

=

2

7

]

=

5

2

×(

49

4

)

−2

=

5

2

×

4

49

R

2

R

1

=

10

49

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