Physics-
General
Easy

Question

In the figure shown the section EDFG is fixed. A rod having resistance 'R' is moved with constant velocity in a uniform magnetic field B as shown in the figure. DE & FG are smooth and resistance less. Initially capacitor is uncharged. The charge on the capacitor:

  1. remains constant    
  2. increases with time    
  3. increases linearly with time    
  4. oscillates.    

The correct answer is: increases with time


    B I V equals 1 R plus fraction numerator q over denominator c end fraction text  or  end text B I V equals open parentheses fraction numerator t h subscript 1 end subscript over denominator d t end fraction close parentheses R plus fraction numerator q over denominator C end fraction
    Hence the charge on capacitor increases with time

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