Neha keeps the coil exactly the same as in Activity 4.4 but slides the iron nail out, leaving only the coiled wire Class 8

Neha keeps the coil exactly the same as in Activity 4.4 but slides the iron nail out, leaving only the coiled wire Class 8

Neha keeps the coil exactly the same as in Activity 4.4 but slides the iron nail out, leaving only the coiled wire. Will the coil still deflect the compass? If yes, will the deflection be more or less than before? Class 8

Answer:

Yes, the coil will still deflect the compass as current through it produces a magnetic field. However, the deflection will be less than before, since the iron nail acts as a core that strengthens the magnetic effect.