Asolid nonconducting sphere of radius r carries a charge q distributed uniformly throughout its volume. at a certain distance r1 (r1 < r) from the center of the sphere, the electric field has magnitude e. if the same charge q were distributed uniformly throughout a sphere of radius 2r, the magnitude of the electric field at the same distance r1 from the center would be equal to:

Explanation:

As we know that that electric field inside the solid non conducting sphere is given as

so electric field is given as

now if another sphere has same charge but twice of radius then the electric field at same position is given as

so here we have

electrical power

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