Question

Hello people ~
please help me with this question ^^​

Answer 1

Equilateral triangle means each interior angle has measure 60°

We need the resultant which is our dipole

`\\ \rm\Rrightarrow R=√(A^2+B^2+2ABcos\theta)`

`\\ \rm\Rrightarrow R=√((q\ell)²+(q\ell)²+2(q\ell)(q\ell)cos60°)`

`\\ \rm\Rrightarrow R=√((q\ell)^2+(q\ell)^2+(q\ell)^2)`

`\\ \rm\Rrightarrow R=√(3(q\ell)^2)`

`\\ \rm\Rrightarrow R=√(3){q\ell}`