Question

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

Correct Answer - B
As the switch is turned on, the current flows through the circuit and magnetic field will be produced around it. All iron filings will align in the direction of a magnetic field. But the metallic comb will not behave like an electro magnet, and hence, the iron filing will neither be attracted nor repelled.