At electrostatic equilibrium, the electric field is zero everywhere inside a conductor, and any charge can only be distributed on the surface of the conductor.
a. true
b. false

True

Explanation:

By applying Gauss  law Electric field is zero everywhere  inside the conductor.

According to Gauss law the net flux of an electric field in a closed surface is directly proportional to the enclosed electric charge.  

For example

For a Gaussian surface inside a conductor all the points have zero electric field as the system is in equilibrium. This implies net flux is zero and net charge inside is zero . So all the charge must be at surface on conductor.          

no simpler subs form complex ones. synthesise = make

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards