A copper wire of resistance 3 ohm is redrawn by pulling it until its length is
doubled. What will be the resistance of the wire in the new situation? What will
happen to its resistivity?
Answers
Answered by
0
Answer:
Given Resistance of a wire
R=
A
pL
On, stretching a wire (a) volume of wire remains constant
(b) length of wire increases
(c) Area of cross section decreases
(d) Resistivity of wire = constant
On doubling length by stretching :
L 1 =2L
A 1 =A/2
∴R 1= A 1
pL 1
= 2A
p(2L)
= A4pL
=4R
Explanation:
If my answer help you then please
follow
thankyou
brainliest answer
Similar questions