5. Curl and divergence exercises:

a) On a 25-point graph consisting of r and y coordinates having the integer values {-2,-1,0, 1, 2}

sketch the vector field F = xâ+yŷ and find V x F (curl of F) and V-F (divergence of F).

b) Repeat (a) for F = yâ- rý.

c) Based on above results choose the correct answer in the statements below:

i. V x F 0 implies the field strength varies (along or across) the direction of the field.

ii. V.F #0 implies the field strength varies (along or across) the direction of the field.