Question

If the resistance of conducting wire p is four times the resistance of conducting wire Q then the. Area of cross sectional of area of the wire is

Answer 1

Answer:

According to the question the resistance of conducting wire p is four times the resistance of conducting wire Q. So, first of all let the resistance of the wire p is m1 and the resistance of the wire q is m2

Now according to the expression of resistance

R= k /v [where  v= AREA]

Now, for wire p,

m1= k/v1

Now, for wire q,

m2=  k/v2

m1/m2= v1/v2

4m2/m2= v1/v2

v1/v2= 1/4

Hence the answer is 1/4