The magnetic effect of current was discovered by:

If the direction of electric current in a solenoid when viewed from a particular end is anticlockwise, then this end of solenoid will be:

The most suitable material for making the core of an electromagnet is:

A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:

The magnetic field lines in the middle of the current-carrying solenoid are :