List two distinguishing features between two fields of :
i)a current carrying solenoid
ii) a bar magnet
Answers
Answer:polarity of current carrying solenoid can be reversed and also the current can be increased whereas it is not possible in the case of a bar magnet
Explanation:
Answer:cylindrical coil whose diameter is very less in comparison to the length and the axis of the turns must be parallel to axis solenoid then this coil is called a ideal solenoid (it looks like a helical spring). The magnetic field lines in a solenoid, through which current is passed, are as shown in figure. Magnetic field lines plotted for a bar magnet are as shown in figure. Two disinguish featues of field - Solenoid Bar magnet 1. Field strength can be changed by changing the amount of current. 1. Field strength is fixed and cannot be changed. 2. Poles can be interchanged by changing the direction of current 2. Poles cannot be interchanged i.e. field direction is fixed.