# Solved Problems-5

Problem-5

Express the field , in cylindrical coordinates, and calculate at the point

*P*(*r*= 2,*Ï†*= 60Â°,*z*= 3).Solution

In the cylindrical system,

But,
Substituting these values,

Hence, the vector in Cartesian coordinates is written as,
At

Hence, at
âˆ´

But,

*P*(*r*= 2,*Ï†*= 60Â°,*z*= 3), the vector is given as,Hence, at

*P*,