engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Electrician and Wireman Power Systems Earthing
The size of the strip electrode in a cross-section, if made of copper, it should not be smaller than_______.
1
25 × 1.6 mm
2
10 mm × 3 mm
3
20 mm × 2 mm
4
20 mm × 3 mm