Question

A conductor of length 2m and radius of cross section 3mm has the resistance 15ohm find the specific resistance of the conductor​

Answer 1

Answer:

Share

Study later

ANSWER

Current density, J=

A

I

where I= steady current and A= cross section of wire.

Here, J

1

=

A

1

I

=

πr

1

2

I

and J

2

=

A

2

I

=

πr

2

2

I

Thus,

J

2

J

1

=

r

1

2

r

2

2

=

1

2

3

2

=9:1