A coil ACD of N turns and radius R carries a current I Amp and is placed on a horizontal table.K is a very small horizontal conducting ring of radius r placed at a distance Y frm the centre of the coil vertically above the coil ACD .Find an expression for the EMF estabilished when the ring K is allowed to fall freely.Express the emf in terms of instantaneous speed v and height Y.

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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

formula of c in curies temperature please ansewr i am waiting for the answer

Describe in operation electro dynamic whattmetermeter

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