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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors

Consider a current flowing through a resistor. Let K₁ and K₂ denote the average kinetic energies of the conduction electrons and the metal ions, respectively. Which of the following is true?

Options

  1. AK₁ < K₂
  2. BK₁ = K₂
  3. CK₁ > K₂
  4. DAny of these three may occur

Correct answer

C. K₁ > K₂

Step-by-step solution

When a current flows through a resistor, the applied electric field continuously accelerates the conduction electrons, thereby increasing their kinetic energy. These energetic electrons undergo frequent collisions with the metal ions in the lattice, transferring a portion of their kinetic energy to the ions. This energy transfer is responsible for the Joule heating of the resistor. For a continuous net transfer of energy from the conduction electrons to the metal ions, the average kinetic energy of the conduction e

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