Question

Solenoid and irrotational in vector calculus​

Answer 1

Answer:

In vector calculus a solenoidal vector field is a vector field v with divergence zero at all points in the field: A common way of expressing this property is to say that the field has no sources or sinks. The field lines of a solenoidal field are either closed loops or end at infinity.

Answer 2

Answer:

del is an operator defined as i d/dx+j d/dy +k d/dz

when vectors dot product with del is zero then it is called solenoidal vector

Explanation:

And if Del's cross product with vectors is zero then it is called irrotational vector