Question

Calculate the area of cross section of a wire of length 2m, its resistance is 25Ω and the resistivity of material of wire is 1.84*10-6 Ωm.
12. Why is tungsten metal used in bulbs but not in fuse wires?​

Answer 1

Answer:

Resistance = (resistivity*length)/area

25 = (1.84*10^-6*2)/area

area = (3.68*10^-6)/25

area = (0.736*10^-6)/5

area = 0.1472*10^-6

area = 1.472*10^-7 m^2

Explanation:

it is normal