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Easy

Question

Two short electric dipoles are placed as shown. The energy of electric interaction between these dipoles will be
125201

  1. fraction numerator 2 k P subscript 1 end subscript P subscript 2 end subscript c o s invisible function application theta over denominator r to the power of 3 end exponent end fraction    
  2. fraction numerator negative 2 k P subscript 1 end subscript P subscript 2 end subscript c o s invisible function application theta over denominator r to the power of 3 end exponent end fraction    
  3. fraction numerator negative 2 k P subscript 1 end subscript P subscript 2 end subscript s i n invisible function application theta over denominator r to the power of 3 end exponent end fraction    
  4. fraction numerator negative 4 k P subscript 1 end subscript P subscript 2 end subscript cos invisible function application theta over denominator r to the power of 3 end exponent end fraction    

The correct answer is: fraction numerator negative 2 k P subscript 1 end subscript P subscript 2 end subscript c o s invisible function application theta over denominator r to the power of 3 end exponent end fraction

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