Physics-
General
Easy

Question

In a hydrogen discharge tube it is observed that through a given cross-section 3.13 cross times 1 0 to the power of 15 end exponent electrons are moving from right to left and 3.12 cross times 1 0 to the power of 15 end exponent protons are moving from left to right. What is the electric current in the discharge tube and what is its direction

  1. 1 m Atowards right    
  2. 1 m A towards left    
  3. 2 m A towards left    
  4. 2 m A towards right    

The correct answer is: 1 m Atowards right


    I equals n subscript e end subscript q subscript e end subscript plus n subscript p end subscript q subscript p end subscript equals 1 m A towards right

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