If the specific charge (charge to mass ratio) of first ball is k, the specific charge of second ball is

The ratio of charge and mass would be greatest for

Two small conducting balls A and B of radius r1 and r2 have charges q1 and q2 respectively. They are connected by a wire.Obtain the expression for charges on A and B, in equilibrium

The centre of the ball, still carrying a charge of 1.2 × 10-6 C, is now placed 0.40 m froma point charge Q. The charge on the ball acts as a point charge at the centre of the ball.P is the point on the line joining the charges where the electric field strength is zero.The distance PQ is 0.22 m.0.40 m0.22 mP Q+1.2 µCCalculate the charge on Q. State your answer to an appropriate number ofsignificant figures.

Two pith balls, each with a mass of 1.2 g, are attached to non-conducting threads and suspended from a common hook. Each thread has a length of 29.7 cm. The balls are then given an identical charge, which causes them to separate. In equilibrium, the threads are separated by an angle of 10.0°. Calculate the charge on each pith ball, in coulombs (C).

Two point charges, q1 and q2 are separated by a distance d. For convenience, we will say that q1 is at the origin (0,0) on a coordinate system, q2 is at (d,0) and a reference point p is directly above q2 at a distance h at point (d,h). q1 has value 1μ C and q2 has value 8μ C. Take d= 1.1m and h= 0.7m. Note k=9×109Nm2/C2 q1 and q2 both have mass 0.1 kg. If they are released, what will be the final speed of q1 (when the charges collide or when they are far enough apart that they no longer interact)? Give your answer in m/s but do not include the units in your response. Include three significant digits in your answer.