Q. Materials which can readily be inspected with frequencies of 1 to 5 MHz are: (Solved)
1. Steel, cast iron and concrete
2. Titanium, wood and aluminium
3. Magnesium, titanium and steel
4. All of the above
- c. Magnesium, titanium and steel
1. Steel, cast iron and concrete
2. Titanium, wood and aluminium
3. Magnesium, titanium and steel
4. All of the above