When is the sum of the two vectors maximum and when minumum ?

When is the sum of two vectors maximum and when minimum.

When the resultant of two vectors is maximum and when minimum ?

When the sum to two vectors is maximum?

When is the sum of two non zero vectors is zero ?

When the magnitude of the resultant of the two vectors is maximum?

Resultant of the two vector is maximum when angle between them is :

The ratio of amplitudes of two waves emitted from two coherent sources is 2:1 . If these two waves get superposed the ratio of maximum and minumum intensity will be