Question

a piece of wire is red draw by pulling it until its length doubked select the correct relationship if R is the original resistance and R is the new resistance of the wire​

Answer 1

Step-by-step explanation:

Since the length of the wire is doubled, its area of cross-section is halved so as to keep the volume of the wire constant. Now the resistance of the wire is proportional to length of the wire, since the length of the wire is doubled its resistance also doubles due to doubling of the length.

Answer 2

refer to the attachment ❤️....