Solenoid 2 has twice the diameter, twice the length, and twice as many turns as solenoid 1. How does the field B2 at the center of solenoid 2 compare to B1 at the center of solenoid 1?

Complete Question

The complete question is shown on the first uploaded image

The correct option is  option 3

Explanation:

From the question we are told that

   The diameter of solenoid 1 is  

   The length of solenoid 1 is  

    The  number of turns of solenoid is  

   The diameter of solenoid 2 is  

   The length of solenoid 2 is  

    The  number of turns of solenoid  2 is    

Generally the magnetic in a solenoid is mathematically represented as

From this equation we see that

Here C stands for constant

=>  

=>    

=>  

=>  

=>  

=>  

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explanation:

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