Draw the pattern of field lines due to solenoid carrying electric current. Mark the north and south pole in the diagram.
Important Questions on Magnetic Effects of Electric Current
A magnetic compass needle is placed in the plane of paper near point A as shown in Figure. In which plane should a straight current carrying conductor be placed so that it passes through A and there is no change in the deflection of the compass? Under what condition is the deflection maximum and why?
Under what conditions is permanent electromagnet obtained if a current carrying solenoid is used? Support your answer with the help of a labelled circuit diagram.
AB is a current carrying conductor in the plane of the paper as shown in Figure. What are the directions of magnetic fields produced by it at points P and Q? Given where will the strength of the magnetic field be larger?
From the figure state the direction in which north pole of the needle will deflect:
