Question

If the strength of the magnetic field at A is 10 units, the strength of the magnetic field at B is _____. 640 units 6.4 units 2.5 units 1.25 units NEXT

Answer 1

Option C) 2.5 units

Step-by-step explanation:

Answer 2

Answer : Option C) 2.5 units

Explanation : For calculating the strength of a unknown magnetic field in comparison with the given magnetic field we can use the magnetic formula as;


`( S_(1))/(S_(2)) = ( (D_(1)^(2)) )/((D_(2)^(2))) .`

On substituting the values we get;


`(10)/(x) = (4^(2))/(2^(2))` ;

On solving we get the magnetic B field strength as 2.5 units