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| 1. |
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» RESISTANCE = (resistivity*length)/area25 = (1.84*10^-6*2)/AREAAREA = (3.68*10^-6)/25area = (0.736*10^-6)/5area = 0.1472*10^-6area = 1.472*10^-7 m^2Explanation:it is normal | |