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A cylindrical solid of length 1m and r 1m is connected across a source of of end 10 V and negligible internal resistance shown in pic.the resistivity is given by r=b-c.Find electric field at point P at a distance 10 cm from left end.
(Figure is  in attached image) 
4 months ago

Answers : (1)

Khimraj
3008 Points
							
Resistance of cylinder = \int_{0}^{1}\rho dx/A = \int_{0}^{1}bx dx/\pi = b/2\pi
E = dV/dx = idR/dx = id/dx(bx2/A) = ib2x/\pi
= 40x
at x =10 cm = 0.1m
= 4 V/m
Hope it clears.........................
4 months ago
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