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JEE Main201815 Apr 2018Evening ShiftPhysicsElectrostaticsActual

A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge density of the rod is , how long will the charges take to travel a distance d ?

Options

  1. A2 dA IT
  2. B2 dA I
  3. CdA I
  4. DdA IT

Correct answer

C. dA I

Step-by-step solution

Charge density aligned & = charge volume = q A d q= A d & Also, q=I T T= q I = A d I aligned

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