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Current Electricity question

2020 · Shift 1 · Q46
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Current Electricity question

2020 · Shift 1 · Q46

JEE AdvancedPhysicsCurrent ElectricityMultiple correct+4 / −2
Shown in the figure is a semicircular metallic strip that has thickness t and resistivity ρ\rhoρ. 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 Δ\DeltaΔ V 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) JEE Advanced 2020 Paper 1 Offline Physics - Current Electricity Question 30 English
  1. A
    I=V0tπρln⁡(R2R1)I = {{{V_0}t} \over {\pi \rho }}\ln \left( {{{{R_2}} \over {{R_1}}}} \right)I=πρV0​t​ln(R1​R2​​)
  2. B
    the outer surface is at a higher voltage than the inner surface
  3. C
    the outer surface is at a lower voltage than the inner surface
  4. D
    Δ\DeltaΔ V ∝\propto∝ I2
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