Hai quả cầu kim loại có bán kính r bằng nhau và bằng 2,5 cm đặt cách nhau 1 m, điện thế của các quả cầu lần lượt là 1200 V và -1200 V. Tính điện tích của mỗi quả cầu.

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply.the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?