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while deriving the expression for the magnetic induction due to a straight wire carrying current.... why in the final step of integrating the expression of dB to get B ... we take limits as - 1 and 2 WHY MINUS 1 ????? Consult figure ....(and pradeep's fundamental physics .... NOT HCV ) in HCV it is done some other way..... if minus is taken because it is the downward angle.....then why donot we take minus in case of ????? it is also downward...!!


while deriving the expression for the magnetic induction due to a straight wire carrying current....
why in the final step of integrating the expression of dB to get B ... we take limits as - 1 and 2   
 
WHY MINUS 1 ?????
 
Consult figure ....(and pradeep's fundamental physics .... NOT HCV )
in HCV it is done some other way.....
 
if minus is taken because it is the downward angle.....then why donot we take minus in case of  ????? it is also downward...!!


Grade:9

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