Exam 3: Electric Potential

Use the following figure to answer the next problem. -The electrostatic potential energy of the system of point charges q₁ = 1 µC, q₂ = -2 µC, and q₃ = 3 µC at the corners of the equilateral triangle whose side s = 40 cm is

Two protons in a nucleus of ²³⁸U are 6.0 *10^-15 m apart. The electrostatic potential energy of the pair is approximately

Use the following to answer the next question. -The work required to bring a positively charged body from very far away is greatest for point _____.

Use the following figure to answer the next four problems: -ABC is a straight line with AB = BC = 0.60 nm. BP is perpendicular to ABC and BP = 0.80 nm. Charges of +3.2 × 10^-19 C are placed at A and B. The electric potential at P is approximately

Two parallel metal plates 5.0 cm apart have a potential difference between them of 75 V. The electric force on a positive charge of 3.2 × 10^-19 C at a point midway between the plates is approximately

The electric potential in a region of space is given by V(x, y, z) = (10 V/m) x + (20 V/m) y + (30 V/m) z The z-component of the electric field in this region is

The figure depicts a uniform electric field. The direction in which the increase in the electric potential is a maximum is

Use the following figure to answer the next problem. -Four point charges q₁ = 1 µC, q₂ = 2 µC, q₃ = 3 µC, and q₄ = 4 µC are located at the corners of a square whose side s = 1 m. The electrostatic potential energy of this system of charges is

A charge of 5.0 mC is located in a uniform electric field of intensity 3.5 × 10⁵ N/C. How much work is required to move this charge 50 cm along a path making an angle of 33° with the electric field?

Use the following figure to answer the next problem: Two equal positive charges are placed x m apart. The equipotential lines are at 100 V interval. -The potential for line c is

Three charges are brought from infinity and placed at the corner of an equilateral triangle. Which of the following statements is true?

What is the approximate radius of an equipotential spherical surface of 30 V about a point charge of +15 nC if the potential at an infinite distance from the surface is zero?

The electrostatic potential energy of two protons separated by 2.6 * 10^-15 m is approximately

The dielectric strength of the atmosphere is of the order of

The electrical potential 2.0 cm from a point charge of Q₁ = +6.5 *10^-9 C and 3.5 cm from a second charge Q₂ is 1.2 kV. Find Q₂.

The graph that best represents the electric potential of a uniformly charged spherical shell as a function of the distance from the center of the shell is

A conducting sphere of radius r₁ = 10 cm and charge q₁ = 2 $\mu$ C is placed far apart from a second conducting sphere of radius r₂ = 30 cm and charge q₂ = 3 $\mu$ C. The two spheres are then connected by a thin conducting wire. What is the potential on the surface of the first sphere after the two spheres are connected by the wire? Use the reference V = 0 for r at infinity.

A uniform electric field exists between two parallel plates separated by 1.2 cm. The intensity of the field is 23 kN/C. What is the potential difference between the plates?

The voltage between the cathode and the screen of a computer monitor is 12 kV. If we assume a speed of zero for an electron as it leaves the cathode, what is its speed just before it hits the screen?

The metal sphere at the top of a small Van de Graaf generator has a radius of 10 cm. How much charge can be accumulated on this sphere before dielectric breakdown of the air around it occurs? (The dielectric strength of air is 3.0 MV/m.)