MCQ
Which of the following cannot be used in electrical wires?
- ACopper.
- BSilver.
- CAluminium.
- ✓Iron.
✓
Answer
Correct option: D.
Iron.
All the given metals are good conductors of electricity. But, iron cannot be used in electrical wires because it is brittle and corrodes when it comes in contact with the oxygen in the air.
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