1.

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

Answer»

iron filings will fly away from the comb, when switch is turned off.
iron filings align in THEDIRECTION of the MAGNETIC field produced around the metallic comb.
iron filings will be attracted by the comb.
Both (b) and (c).

Solution :As the switchis turned on,the current flows through the CIRCUIT and magnetic field will be produced around it. All iron filings will align in thedirection of a magnetic field. Butthe metallic comb will not behave like an ELECTRO magnet, and hence, the iron FILING willneither be attracted nor repelled.


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