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Manipal MET2014PhysicsCurrent Electricity

Consider the cylindrical element as shown in the figure. Current flowing the through element is I and resistivity of material of the cylinder is . Choose the correct option out the following.

Options

  1. APower loss in first half is four times the power loss in second half
  2. BVoltage drop in first half is twice of voltage drop in second half
  3. CCurrent density in both halves are equal
  4. DElectric field in both halves is equal

Correct answer

B. Voltage drop in first half is twice of voltage drop in second half

Step-by-step solution

aligned R₁ R₂ = A₁ A₂ = & 4 1 & P₁ P₂ = I^2 R₁ I^2 R₂ = 4 1 V₁ V₂ = I R₁ I R₂ = 4 1 & J₁ J₂ = 1 4 aligned

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