railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrician and Wireman Electrical Networks Basic Electricity
Find the length of a copper wire of 1.7 sq-mm cross-sectional area, which has a resistance of 0.3 Ω. The resistivity of copper is given as 0.017 micro-ohm meter.
1
60 m
2
30 m
3
40 m
4
20 m