Question

The below arrangement in its current state can attract iron filings if ___________

i) the switch is closed.

ii) the terminals are reversed and the switch is closed.

• A. Only i) is correct
• B. Both i) and ii) are correct
• C. Only ii) is correct
• D. None of these

Answer 1

The correct option is B

Both i) and ii) are correct

The coil behaves as a magnet as long as current passes through it. The switch in the given diagram is open. Hence, the above arrangement will not behave as an electromagnet, as there is no current in the circuit. Hence, it will not attract the iron filings. Also, if the terminals of the battery are reversed, it will only change the direction of the current which will still attract the iron filings.