Questions
Shown in the figure is a semicircular metallic strip that has thickness t and resistivity . Its inner radius is R1 and outer radius is R2. If a voltage V0 is applied between its two ends, a current I flows in it. In addition, it is observed that a transverse voltage develops between its inner and outer surfaces due to purely kinetic effects of moving electrons (ignore any role of the magnetic field due to the current). Then (figure is schematic and not drawn to scale)-
detailed solution
Correct option is A
All the elements are in parallell=πx and A=tdx⇒dx=ρπxtdx∴∫1dr=∫R1R2 tdxρπx1r=tπρlnR2R1 Resistance =πρtℓnR2R1i=V0tlnR2R1πρ (A)(−eE→) will be inward direction in order to provide centripetal acceleration. Therefore electric field will be radially outwardVouterTalk to our academic expert!
Similar Questions
An infinite line charge of uniform electric charge density lies along the axis of an electrically conducting infinite cylindrical shell of radius R. At time t = 0, the space inside the cylinder is filled with a material of permittivity and electrical conductivity . The electrical conduction in the material follows Ohm’s law. Which one of the following graphs best describes the subsequent variation of the magnitude of current density j(t) at any point in the material ?
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