Question

two wires of same material have their lengths in ratio 1:4 and their ratio of the area of cross section is 1:2.find the ratio of resistance of wire​

Answer 1

Answer:

R= resistivity×L/A here both wire are made up of same material so resistivity is same so R1=R2=L1×A2/L2×A1 ,,,, L1/L2 = 1/4, A1/A2=1/2 ,,

R1/R2= 1×2/4 means R1/R2= 1/2