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IIT JEE 2006 Paper : PHYSICS Section I - Multiple Choice

Each question below has only one correct answer.
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Multiple choice

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iit_jee_2006_physics_5a An electric current I passes through a composite element consisting of two cylindrical rods of equal length as shown in the figure. The radius r1 of Rod 1 is twice the radius r2 of Rod 2. The resistivity of the material of both the rods is ρ. Which one of the following is correct?

  Electric field in both the rods is equal.

  Current density in both the rods is equal.

  Voltage drop in Rod 2 is two times the voltage drop in Rod 1.

  Power loss in Rod 2 is four times the power loss in Rod 1.

  Half-n-half Clue

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