Q. A disadvantage of AC current is that it: (Solved)
1. Cannot be used with dry powder
2. Has poor penetrating power
3. Can only provide low flux densities
4. Cannot be used for residual magnetic particle testing
- b. Has poor penetrating power
1. Cannot be used with dry powder
2. Has poor penetrating power
3. Can only provide low flux densities
4. Cannot be used for residual magnetic particle testing