f the current through the coil stops flowing. Will the coil remain an electromagnet?

The figure shows a simple electromagnet made of a coil of insulated wire wrapped around an iron nail.When the switch closed, which of the following will make this electromagnet stronger? (i) increasing the number of coils(ii) adding more turns to the coil(iii) increasing the direct current flowing through the coil(iv) changing the direct current flowing through the coil to alternating current.*1 point

The coils of wire surrounding the iron core of an electromagnet are called:a split ring commutator.1an armature.2a solenoid.3a brush.

What do you WONDER about the behaviour of the current-carrying coil?

A coil of wire is carrying an electric current. How will the magnetic field of the coil be affected if an iron rod is placed in its center ?A The field will be cancelled out. B The strength of the field will increase. C The strength of the field will decrease. D The direction of the field will reverse.

A steady current is passing through a coil, magnitude of self- induced emf in it,will be:A. zero ⃝ B. maximum