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The dot product is missing. The integral must also be multiplied by a Cosine of the angle between the vectors. dl$dl$ and dr$dr$ are the same thing. It's just an infinitesimally small distance on the direction of the field.
The dot product is missing. The integral must also be multiplied by a Cosine of the angle between the vectors. dl and dr are the same thing. It's just an infinitesimally small distance on the direction of the field.
The dot product is missing. The integral must also be multiplied by a Cosine of the angle between the vectors. $dl$ and $dr$ are the same thing. It's just an infinitesimally small distance on the direction of the field.
The dot product is missing. The integral must also be multiplied by a Cosine of the angle between the vectors. dl and dr are the same thing. It's just an infinitesimally small distance on the direction of the field.
