use (i) the Ampere's law for H and (ii) continuity of lines of B, to conclued that inside a bar magnet, (a) lines of H run from the N pole to S pole, while (b) lines of B must run from the S pole to N pole.

Magnetic field lines can netiher emanate from a point nor end on a point. Yet the field lines outside a bar magnet do seem to start from the North pole and end on the South pole. Does the second fact contradict the first? Explain.

The direction of the neutral points is on the equitorial line of a bar magnet, when the north pole of the magnet is pointing towards

The equation n s of the lines parallel to 5x-12 y+26=0 and at a distance of 4 units from it are:

AB is a vertical pole with B at the ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is 60^@ . He moves away from the pole along the line BC to a point D such that CD =7m. From D, the angle of elevation of the point A is 45^@ . Then the length of the pole is:

A short linear object of length b lies along the axis of a concave mirror of focal length f at a distance u from the pole. What is the size of the image?

Let O(0,0),A(2,0),a n dB(1 1/(sqrt(3))) be the vertices of a triangle. Let R be the region consisting of all those points P inside O A B which satisfy d(P , O A)lt=min[d(p ,O B),d(P ,A B)] , where d denotes the distance from the point to the corresponding line. Sketch the region R and find its area.

Two thin bar magnets of pole strengths 4Am and 7Am respectively and length 0.21m and 0.12m respectively are placed at right angles to each other with the N-pole of first angles to each other with the N-pole of first touching the S-pole of the second. Find the magnetic moment of the system.

The slope of a straight line through A(3,2)i s3//4 Find the coordinates of the points on the line that are 5u n i t s away from Adot