Pole

The strength of a magnetic pole is measured in terms of pole strength. Pole strength depends on number of free poles exposed at the end of the magnet. Number of free poles exposed at the end of magnet inturn depends on the area of cross section of the magnet. A bar magnet has a pole strength 'K'. If is cut into 2007 parts as shown in the figure. The pole strength of each piece now is ____

A pole on the ground leans 60^(@) to the vertical. At a point a meters away from the base of the pole on the ground, the two halves of the pole subtend the same angle. If the pole and the point are in the same vertical plane, the length of the pole is

Poling process :

Two north poles each of pole strength m and a south pole of pole strength m are placed at the three corners of an equilateral triangle of side a. The intensity of magnetic induction field strength at the centre of the triangle is

A straight pole A subtends a right angle at a point B of another pole at a distance of 30 metres from A, the top of A being 60^(@) above the horizontal line joining the point B to the pole A.The length of the pole A is,in metres.

A North pole of 40A-m is palced 20 cm apart from a South pole of 80A-m . Calculate the distance of a point from the Sourth pole on the line joining the two poles where the resultant field due to these poles is zero

Two magnetic poles of pole strength 324 milli amp.m. and 400 milli amp m are kept at a distance of 10cm in air. The null point will be at a distance of …… cm, on the line joining the two poles, from the weak pole if they are like poles.

Two poles are erected on either side of the bank of a river just opposite to each other.One pole is 40m high.Form the top and foot of this pole,the angles of elevation of the top of the other pole are 30^(@) and 60^(@) respectively.Find the height of the other pole and the width of the river.

Let 10 vertical poles standing at equal distances on a straight line , subtend the same angle of elevation alpha at a point O on this line and all the poles are on the same side of O. If the height of the longest pole is h and the distance of foot the smallest pole form O is alpha then the distance between two consecutive poles, is