A spherical drop of water carrying a charge of 37 pC has a potential of 430 V at its surface (with V = 0 at infinity). (a) What is the radius of the drop? (b) If two such drops of the same charge and radius combine to form a single spherical drop, what is the potential at the surface of the new drop? (a) Number Units m (b) Number Units V. Click if you would like to Show Work for this question: Open Show Work

Two large charged plates of charge density ±18µC/m² face each other at a separation of 7 mm. Choose coordinate axes so that both plates are parallel to the xy plane, with the negatively charged plate located at z = 0 and the positively charged plate at z = +7 mm. Define potential so that potential at z = 0 is zero (V(z = 0) = 0). Hint a. Find the electric potential at following values of z: o potential at z = -7 mm: V(z = -7 mm) = o potential at z = +1 mm: V(z = +1 mm): = o potential at z = +7 mm: V(z = +7 mm) = = o potential at z = +9.2 mm: V(z = +9.2 mm) = V. V. V. V. b. An electron is released from rest at the negative plate. With what speed will it strike the positive plate? The electron will strike the positive plate with speed of m/s. (Use "E" notation to enter your answer in scientific notation. For example, to enter 3.14 × 10¹2, enter "3.14E12".)

Please answer all parts of this question

The wire in the figure to the right has linear charge density λ. What is the electric potential at the center of the semicircle? Give your answer in terms of λ, R, € and appropriate constants. *Hint: you do not need to integrate each segment, you can use results from previous work. Answer: V = 2/(4€)(1+2ln(3)/π) 2 R 2R

A uniform electric field with a magnitude of 1200 N/C points in the negative x direction as shown in the figure below. (a) What is the difference in the electric potential between points A and B? (b) What is the difference in the electric potential between points B and C? (c) What is the electric potential difference between points C and A? (d) Is it possible to determine the electric potential at point A or not? Explain your answer. E [1] 3.0 cm A B 4.0 cm 5.0 cm C y "L. X

d and e

The charge density on a disk of radius R = 11.2 cm is given by o = ar, with a = 1.30 μC/m³ and r measured radially outward from the origin (see figure below). What is the electric potential at point A, a distance of 30.0 cm above the disk? Hint: You will need to integrate the nonuniform charge density to find the electric potential. You will find a table of integrals helpful for performing the integration. R A A

question 1 and 2 please