Question

Two wires A and B are made of copper. Both wires are 1m long but wire A is 1mm thick and wire B is 2 mm thick. The resistivity is
a. more for A
b. more for B
e same for both A and B
d. cannot be compared​

Answer 1

$\huge \mathbb \red {ANSWER} \:$

according to question

Wire A = 1m long

Wire B = 1m long

But A is 1mm thicker then B

TO FIND

resistivity of A in comparison to B

have same restivity so option (e ) is correct

$\huge \green {explantion}$

• this is becoz resistivity does not depends upon shape or size of material

• itn depends upon nature and temperature

$\: \huge \blue {extra \: info}$

resistivity. :- the property of to permit flow of charge though it it depends on nature and temperature

$\huge \: formula \: \: \huge \color{brown} \boxed{resitivity = \frac{length(l)}{aera \: of \: cross \: section \: \times resistnce} }$

1st nature :- a) for conductor - conductor have low restivity

b) insulators - they have high resistivity

2nd temperature :- if temperature increases in conductor resistivity also increase

hope it helps

be brainly