Electromagnetics: Vector analysis

[rizwanibn]

IItsHi.I have a problem that i am trying to solve.The complete question is shown in the image:

In this question i solved the (a) and (b) part.But i did'nt understand the (c) part.Can you please explain?Thank you.(Note:The answers is given beneath the question)

 

[BruceW]

hey, welcome to physicsforums :) uh, for part c, it asks for a surface where the vector has magnitude equal to 1. For now, don't worry about whether it will make a surface or not, just think about how to find where the magnitude is equal to 1.

 

[rizwanibn]

I've solved it.Thank you.

 

[BruceW]

no worries!

 

[rizwanibn]

Hello. .Mr.Bruce..

Looking back at the same question,i find it difficult to remember how i solved it.
Can you put some light on it.
Magnitude of S=1...?!
Thanks.

 

[rizwanibn]

Solved it again...!
Thanks anyway...
Looking at a concept that you understood couple of years ago and seeing it now wondering how did i...?!

Whew...!