railway RRB Technician Grade 3 Mock Test 2024 Physics Current, Resistance and Electricity Resistance and Resistivity
If the resistivity of nichrome wire is 110 × 10-8 Ω m, its length is 5.5 m and its resistance is 22 Ω, then the area of cross section is:
1
3.4 × 10-8 m2
2
275 × 10-7 m2
3
2.75 × 10-7 m2
4
34 × 10-4 m2