Physics
Grade-10
Easy
Question
A tiny rod is wrapped in conducting coils and allowed to conduct current for a period of time. When the rod was removed, it was discovered that it did not attract iron, the material of the rod may be:
- Copper
- Cobalt
- Steel
- Nickel
Hint:
Copper
The correct answer is: Copper
The current carrying straight wire made up of copper cannot attract nearby iron objects as the strength of magnetic field induced is quite weak. Magnets attract the metals iron, cobalt, nickel and steel, but they do not attract other metals.
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