Question

it was asked for board2020 science

please solve it​

Answer 1

Since the resistance of the wire is doubled

Therefore the new resistance will be=6ohm+6ohm=12ohm

hope you like it

Answer 2

Answer:

1.5Ω

Explanation:

If a wire was doubled on itself :

1. Length gets decreased to half its original.
2. Area of cross section is doubled.

Now, given that original resistance is 6Ω, if its length was 'l' and area of cross section be 'A',

6Ω = (p)(l/A). - (1)

Now, new resistance 'R',

=> R = (p)(l/2)(1/2A)

=> R = (p)(l/4A)

=> R = 1/4(p)(l/A). - (2)

From (1) and (2),

=> R = 1/4(6Ω)

=> R = 6/4Ω

=> R= 1.5Ω

Thus, new resistance would be 1.5Ω.