Question

A current-carrying metallic comb is placed close to small iron fillings, then the

• A. iron filings will fly away from the comb, when switch is turned off.
• B. iron filings align in the direction of the magnetic field produced around the metallic comb
• C. iron filings will be attracted by the comb
• D. Both (b) and (c)

Answer 1

The correct option is B

iron filings align in the direction of the magnetic field produced around the metallic comb

1. In a current-carrying metallic comb circuit when the switch is turned on, the current flows in the circuit, and the magnetic field is produced around it.
2. Iron filings are metals that will align in direction of the magnetic field.
3. The metallic comb does not behave as a magnet so iron fillings will not be attracted or repelled from it.
4. Hence, a current-carrying metallic comb is placed close to small iron fillings, then the iron filings align in the direction of the magnetic field produced around the metallic comb.

Hence the correct option is (B).