Question

Ratio of 18 gm to 12 gm

Answer 1

Correct option is D)

Given : m

1

=12 g m

2

=18 g L

1

:L

2

=3:4

Resistance of wire R=

m

ρL

2

d

where d (density ) and ρ (resistivity) are constants

⟹

R

2

R

1

=

m

1

m

2

(

L

2

L

1

)

2

∴

R

2

R

1

=

12

18

(

4

3

)

2

=

32

27