For a long time an inductor L1 is in series with resistance R in presence of cell of emf 20V. Then at t=0 the inductor L1 is connected in series with inductor L2 and the resistance R with the same cell of emf 20V. Current in the circuit as a function of time is I=2-4/3exp(-2t/3). What is R/L1?

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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