Electromagnet consists of a current - carrying solenoid with Alnico rod (an alloy) put in it . true or false?

An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is true ?

How does a solenoid behave like a magnet ? Can you determine the north and south poles of a current - carrying solenoid with the help of a bar magneti ? Explain.

Whose magnetic field resembles the magnetic field of a current - carrying solenoid ?

When an iron placeis introuduced inside a current - carrying solenoid the mangetic field of the solenoid ……… .

Out of the following , which statement is wrong for a current - carrying solenoid ?

Write the equation of magnetic field on the axis of current carrying finite solenoid.

Draw field lines on a bar magnet, a current carrying finite solenoid and electric dipole.

In which condition is the magnetic force acting on a given current - carrying rod placed in a magnetic field maximum and in which condition would the magnetic force not act on the rod ? (Assume that the current through the rod and the strength of the magnetic field are not changed).

In the experiment to show that a current - carrying condcutor (rod) when placed in a unifrom magnetic field experience a force .What will happen if you experiences a force . What will happen if you interchange ther terminals of the battery connected in the circuit ?

Consider a metal ring kept (supported by a cardboard) on top of a fixed solenoid carrying a current I as per figure. The centre of the ring coincides with the axis of the solenoid. If the current in the solenoid is switched off, what will happen to the ring ?