Question

the resistance of 10 centimetre copper wire is 100 ohms then what will be the resistance of 20 CM copper wire of the same area of cross section​

Answer 1

Answer:

200 ohms

Explanation:

Resistance is directly proportional to the length of the conductor

and

Resistance is inversely proportional to the area of cross section of the conductor.

In this case, the area of cross section is same. The length is doubled

thus, the resistance is doubled.