A uniform but time varying magnetic feild is present in a circular region of radius R.The magnetic field is perpendicular and into the plane of the loop and the magnitude of field is increasing at a constant rate aplha.There is a straight conducting rod of length 2R placed as shown in fig.The magnitude of induced emf across the rod is?

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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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Describe in operation electro dynamic whattmetermeter

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