Electricity and Magnetism Answers

1.Find the potential at a distance of 0.07 m from a -6 nC charge.

2.What would be the PE of a -5 nC charge placed at this point?

3.What is the electric field strength at a point 40 cm from the a charge of 5x10^-9 C?

What is the electric field strength at a point 40 cm from a charge of 5x10⁹ C?

What would be the PE of a -5nC charge placed at this point?

Find the potential at a distance of 0.07m from a -6nC charge.

Suppose a friend asks you to explain how electric potential relates to potential energy. Write a brief explanation that you could use to explain this concept to a friend who does not understand the relationship between two concepts

What is the electric field due to a point charge of 20µC at a distance of 1 meter away from it?

How much charge experiences a force of 5.0 x10^-3 N due to an electric field of 10 N/C?

What is the force on an electron in an electric field of 500 N/C?

A charge of 5 X 10^-6 C experiences a force of 10 N at a certain point in space. What is the electric field intensity?

Four point charges are equally separated by 1.0 m in air with q1= 30 nC, q2 = 4.0 nC, q3 = 2.0 nC, q4 = 5.0 nC. (a) What is the potential at a point halfway between q1 and q2? (b) How much work is needed to bring a 6 nC charge from infinity to this point?

3.The following three charges are arranged as shown. Determine the net force acting on the charge on the far right (q3 = charge 3). q1 = 1.5 x 10^-6C,q2 = - 2.3 x 10^-6C,q3 = -3.5 x 10^-3C.

4.The following charges are placed on the vertices of a right triangle. Charges are the same as that on problem 3.Find the net electrostatic force on charge 1.

Which of the following is TRUE about the speed in a vacuum of these colors of light? 

A. All colors of light have equal speed in a vacuum.

B. All colors of light have varying speeds in a vacuum.

C. Violet light has the highest speed while the red light has the lowest speed.

D. Red light has the highest speed while violet light has the lowest speed.