# ABCD is a square of side "l" .the force at b due to the remaining charges is ..........i need solution the diagram is given belowpls answer faaaaaaaaaast

1
by raoatchut191

2014-10-04T15:17:53+05:30

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Force acts on charge at B due to charges at A,C and D.

Force between two charges =  along the radial direction.

Force on charge at B due to charge at A(Fa) =
=  (towards A along line AB)

Force on charge at B due to charge at C(Fc) =
=  (towards C along line BC)

Force on charge at D due to charge at A(Fd) =
=
=  (towards B along the line DB)

Resultant of force acting on B due to A and C (Fac)= √[2×( )²]
= √2 ×  (towards D along the line DB)

Resultant force (R)= Fac - Fd = √2 ×  +

⇒ R = (√2 - 1/2)

⇒R = ()()  (towards D along the line BD)

⇒|R| =

yess. answer is a. ignore the minus sign from q as it just shows the direction of force. your option contains only magnitude.
thnq very much
Ok now??
yes