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  • A steady current I flows along a simplicity long hollow cylinder of radius R .This cylinder is placed coaxially inside a finite solenoid has n turns per unit length and carries a current I . consid

A steady current I flows along a simplicity long hollow cylinder of radius R .This cylinder is placed coaxially inside a finite solenoid has n turns per unit length and carries a current I . consider pt. p at dist r from the common axis . The correct statement is  

Option: 1

In 0 < r < R mag field is non zero 


Option: 2

In R < r < 2R mag field is along common axis  


Option: 3

In R < r < 2R mag field is tangential to circle of radius r 

 


Option: 4

r > 2R mag field is non zero 


Answers (1)

best_answer

As we have learned

Outside the cylinder -

Thin hollow cylinder:

B_{surface}=\frac{\mu_{o}i}{2\pi R}

 

 

 In region 0 < r < R 

B_p = 0

B_{0}\neq 0

B_{net }\neq 0

R < r <  2R  \Rightarrow B_p \neq 0 \; B_\theta \neq 0

B _{net } \neq 0

 r > 2R        \Rightarrow B_p \neq 0 \; B_\theta \neq 0

 

B_{net }\neq 0

 

 

 

Posted by

Shailly goel

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