Electric Charge...

When a negatively charged conductor is connected to earth,

A point charge of 2.0  μC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?

Two identical conductors of copper and aluminium are placed in an identical electric field. The magnitude of induced charge in the aluminium will be:

A point charge causes an electric flux of  −1.0 ×10³ Nm² /C  to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge.
(a) If the radius of the Gaussian surface were doubled, how much flux would pass through the surface?
(b) What is the value of the point charge? 

A hollow spherical conductor of radius 2m carries a charge of 500  μ C. Then electric field strength at its surface is

Two point charges A and B, having charges +Q and –Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes

Under the influence of the coulomb field of charge +Q, a charge −q is moving around it in an elliptical orbit. Find out the correct statement(s). 

A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field   . Due to the force , its velocity increases from 0 to 6 m s –1 in one second duration. At that instant the direction of the field is
reversed. The car continues to move for two more  seconds under the influence of this field. The average velocity and the average speed of the toy car between  0 to 3 seconds are respectively

Three point charges +q, –2q and +q are placed at points (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = a, y = 0, z = 0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are