In a system of two dipoles placed in the...

In a system of two dipoles placed in the way as shown in figure :

It is possible to consider a spherical surface of radius a and whose centre lies within the square shown through which total flux is `+ ve`

It is possible to consider a spherical surface of their a and whose centre lies within the square shown through which total flux is `-ve`

It is possible to consider a spherical surface of radius a and whose centre lies within the square shown through which total flux is zero

There are two points within the square at which EF is zero.

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The correct Answer is:

A, B, C

`rArr phi_("net")=0`
(D) Electric field is zero only at centre.

A light wire of length l (figure-1) is cut into two pieces in two different ways as shown in (figure -2&3). Different pieces can be arranged in placed of wire as shown and a load can be placed on the massless hanger. Choose the correct statement(s).

The load required to break the wire `B'` is 6 times that required to break `B`

The stress required to break the wire `B` and `C` is same but to break `B` and `B'` is different

The stress required to break `C` and `C'` is same

The load required to break `A` and `B'` is same but, different for `B` and `B'`

The net electrostatics force on the dipole is zero

The electrostatics force on the dipole in `(Qp)/(4piepsilon_(0)r^(3))` and is acting along the dipole moment `vecp`.

Torque acting on dipole is `(Qp)/(4piepsilon_(0)r^(2))` in inward direction.

torque acting on the dipole is `(Qp)/(2piepsilon_(0)r^(2))` in inward direction.