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IIT JEE 2007 Practice : PHYSICS - Multiple Choice


Each question below has only one correct answer.
In the IIT-JEE, you will be awarded 3 marks for each correct answer and −1 for each incorrect answer.
You will be awarded 0 marks for not attempting a question.
Quiz Review
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 thrice the radius r2 of Rod 2. The resistivity of the material of both the rods is ρ. Which one of the following is correct?

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

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

  Electric field in both the rods is equal.

  Current density in both the rods is equal.

  Half-n-half Clue



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