EX3
A spherical conductor has a radius of 14.0 cm and a charge of 62.0 C. Calculate the
electric potential (a) on the sphere surface; and (b) at a position 6.0 cm from the
center.
My step by step solution:

EX9
Two clowns arrange for a performance with one shooting an apple from anothers head. The
speed of the 125-g arrow just before it strikes the apple is 25.0 m/s, and at the time of impact
it is traveling horizontally. If the arrow sticks in the apple and

EX8
A conducting bar of length
moves to the right on two frictionless rails as shown in the figure below. A
uniform magnetic field directed into the page has a magnitude of 0.290 T. Assume R = 9.10 and
= 0.370 m.
(a) At what constant speed should the bar

EX6
Consider the system pictured in the figure below. A 16.4-cm horizontal wire of mass 15.5 g is placed
between two thin, vertical conductors, and a uniform magnetic field acts perpendicular to the page. The
wire is free to move vertically without fricti

EX2
A square plate of copper with 52.0 cm sides has no net charge and is placed in a
region of uniform electric field of 81.0 kN/C directed perpendicularly to the plate.
Find the absolute charge density and charge on either face of the plate. (Neglect the

EX1
In the figure below, q1 = -3.30 C and q2 = 7.00 C. There is a point along the line joining the two
charges, other than infinity, at which the electric field is zero. Write down the equation that
determines the position of that point (You do not need t

EX5
In the figure below,
1
= 23.0 V,
2
= 14.0 V, and R = 14.0 . Using Kirchhoffs rules to write down
equations for determining the three currents in the figure (You do not need to solve the equations).

EX4
A spherical conductor has a radius of 14.0 cm and a charge of 62.0 C. Calculate the
electric potential (a) on the sphere surface; and (b) at a position 6.0 cm from the
center.
My step by step solution:

EX7
The two wires shown in the figure below are separated by d = 9.1 cm and carry currents
of I = 5.50 A in opposite directions. Find the magnitude and direction of the net magnetic field at
point P1.

EX10
A model airplane of mass
0.740 kg flies with a speed of 35.0 m/s in a horizontal circle at the end of a 56.0-m-long
control wire as shown in Figure 1(a). The forces exerted on the airplane are shown in Figure
1(b): the tension in the control wire, th