Physics-
General
Easy

Question

A current carrying loop is placed in a uniform magnetic field in four different orientations, I, II, III, IV, arrange them in the decreasing order of potential energy

  1. I > III > II > IV    
  2. I > II > III > IV    
  3. I > IV > II > III    
  4. III > IV > I > II    

The correct answer is: I > IV > II > III

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A velocity filter uses the properties of electric and magnetic fields to select charged particles that are moving with a specific velocity. Charged particles with varying speeds are directed into the filter as shown in figure. The filter consists of an electric field E and a magnetic field B, each of constant magnitude, directed perpendicular to each other as shown. The particles that move straight through the filter with their direction unaltered by the fields have the specific filter speed, V subscript 0 end subscript . Those with speeds to V subscript 0 end subscript may experience sufficiently little deflection that they also enter the detector.

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