choose the incorrect statement 1)the centre of mass of a two particle system lies on the line joining the two particles being closer to the heavier particle2) in rolling the point of contact of the rolling body remains at rest relative to the surface on which it is rolling 3)parallel axis theorm is applicable only for laminar bodies 4)a particle moving on a straight line may have non zero angular momentum about a point?

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AB is a current carrying conductor in the plane of the paper as shown in the figure below. (i) What is the direction of the magnetic field produced by it at point ‘X’? Write the statement of the rule used to find the direction of field lines. (ii) If the polarity of the battery connected to the wire is reversed, how would the direction of the magnetic field be changed? (iii) Point ‘X’ is at a distance r1 and point ‘Y’ is at a distance r2 (r1

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For minimum flux the angle between the magnetic field and normal to the surface is