# Problem about phasors and magnitude.

Discussion in 'Homework Help' started by tadm123, Nov 24, 2013.

Nov 20, 2013
43
0
Problem:

Find |A|

A= 2$e^{-j120}$ + 2$e^{j60}$

Attempted solution:

I basically just converted it to algebraic form and ended up with:

A= -1-1.73j + 1+ 1.73j

Which ended up canceling everything up.
so,

A= 0 and then the magintude is 0.

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Honestly, it sounded too easy to be true, so have I done any mistakes? If not any help would be appreciated.

Last edited: Nov 24, 2013
2. ### shteii01 AAC Fanatic!

Feb 19, 2010
3,697
555
-173j + 1.73j = -171.27j

Nov 20, 2013
43
0
Oops sorry about that. It's -1.73j + 1.73j

4. ### t_n_k AAC Fanatic!

Mar 6, 2009
5,448
784
Take a piece of paper. Draw the phasors. It's immediately obvious that they cancel each other. No maths needed.